case study class 9 chemistry

Book Solutions
State Boards

Case Study Questions Class 9 Science Matter in our Surroundings

Case study questions class 9 science chapter 1 matter in our surroundings.

CBSE Class 9 Case Study Questions Science Matter in our Surroundings. Important Case Study Questions for Class 9 Exam. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Matter in our Surroundings.

At Case Study Questions there will given a Paragraph. In where some Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks or 4 marks.

CBSE Case Study Questions Class 9 Science – Matter in our Surroundings

Case study 1:.

1.) A matter is anything that has mass and occupies space. Pen, paper, clips, sand, air, ice, etc. are different forms of matter. Every matter is made up of small particles. These particles are so tiny that they can’t be seen with naked eyes. Let’s see about the different characteristics of particles of matter.

All matter is made up of very small particles.
.Particles of matter has spaces between them.
Particles of matter are continuously moving.
Particles of matter attract each other.

Answer the following questions by referring above paragraph.

i.) Which of following is not matter?

c.) smell of perfume

d.) None of these

ii.) Thoughts coming in our mind are example of matter. True or false

c.) None of these

iii.) Which of the following is true about particles of matter?

a.) Particles of matter has spaces between them

b.) Particles of matter are continuously moving

c.) Particles of matter attract each other

d.) All of these

iv.) Give 5 examples of matter in our surroundings

v.) Enlist all properties of particles of matter

Answer key-1

iv.) pen, pencil, notebook, ice and water

v.) Different characteristics of particles of matter are

Case Study 2:

2.) There are three states of matter – solid, liquid and gas.

Solids have a definite shape, distinct boundaries and fixed volumes, that is, have negligible compressibility. Solids have a tendency to maintain their shape when subjected to outside force. Solids may break under force but it is difficult to change their shape, so they are rigid.

Liquids have no fixed shape but have a fixed volume. They take up the shape of the container in which they are kept. Liquids flow and change shape, so they are not rigid but can be called fluid.

Gas as has indefinite shape, no fixed volume. Gas gets the shape and volume of container.

Gas has very low density hence are light. Gas can flow easily and hence are called fluid.

i.) Which of the following state of matter takes shape of container in which it is filled?

d.) Both b and c

ii.) Distance between particles of matter least in

iii.) Compressibility is least in case of

iv.) Give properties of solids.

v.) Give properties of Gases.

Answer key-2

iv.) properties of solid are given below

Solid has fixed volume.
Solid has fixed shape.
Solid has high density.
Solids are heavy.
Solid does not flow.

v.) Properties of gases are

Gas has indefinite shape
Gas has no fixed volume.
Gas gets the shape and volume of container.
Gas fills the container completely.
Gas has very low density.
Because of low density gas are light.
Gas can flow easily and hence are called fluid.

Case Study 3:

3.) What happens inside the matter during change of state? On increasing the temperature of solids, the kinetic energy of the particles increases. Due to the increase in kinetic energy, the

Particles start vibrating with greater speed. The energy supplied by heat overcomes the forces of attraction between the particles. The particles leave their fixed positions and start moving more freely. A stage is reached when the solid melts and is converted to a liquid. The minimum temperature at which a solid melts to become a liquid at the atmospheric pressure is called its melting point.

The temperature of the system does not change after the melting point is reached, till all the ice melts. This happens even though we continue to heat the beaker, that is, we continue to supply heat. This heat gets used up in changing the state by overcoming the forces of attraction between the particles. The amount of heat energy that is required to change 1 kg of a solid into liquid at atmospheric pressure at its melting point is known as the latent heat of fusion. So, particles in water at 0 0 C (273 K) have more energy as compared to particles in ice at the same temperature.

The temperature at which a liquid starts boiling at the atmospheric pressure is known as its boiling point. Boiling is a bulk phenomenon. Particles from the bulk of the liquid gain enough energy to change into the vapour state. A change of state directly from solid to gas without changing into liquid state is called sublimation and the direct change of gas to solid without changing into liquid is called deposition.

i.) A change of state directly from solid to gas without changing into liquid state is called

a.) Sublimation

b.) Deposition

c.) Boiling point

ii.) The direct change of gas to solid without changing into liquid is called

iii.) The energy supplied by heat to solid is used to overcome the forces of attraction between the particles. True or false

iv.) Define melting point and boiling point

v.) Define latent heat of fusion

Answer key-3

iv.) The minimum temperature at which a solid melts to become a liquid at the atmospheric pressure is called its melting point.

The temperature at which a liquid starts boiling at the atmospheric pressure is known as its boiling point.

v.) The amount of heat energy that is required to change 1 kg of a solid into liquid at atmospheric pressure at its melting point is known as the latent heat of fusion.

Case Study 4:

4 .) Do we always need to heat or change pressure for changing the state of matter? Can you quote some examples from everyday life where change of state from liquid to vapour takes place without the liquid reaching the boiling point? In the case of liquids, a small fraction of particles at the surface, having higher kinetic energy, is able to break away from the forces of attraction of other particles and gets converted into vapour. This phenomenon of change of a liquid into vapors at any temperature below its boiling point is called evaporation.

i.) Evaporation of liquid takes place at

a.) Boiling point

b.) Above boiling point

c.) Below boiling point

ii.) Evaporation takes place at surface of liquid because

a.) They are heavy as compare to other particles

b.) They have sufficient kinetic energy to break the force

c.) They are light weight as compare to other particles

iii.) During evaporation particles of liquid change into vapour

a.) From the surface

b.) From the bottom

c.) From all over the liquid

iv.) Define evaporation.

v.) Explain process of evaporation

Answer key-4

iv.) The phenomenon of change of a liquid into vapors at any temperature below its boiling point is called evaporation.

v.) In the case of liquids, a small fraction of particles at the surface, having higher kinetic energy, is able to break away from the forces of attraction of other particles and gets converted into vapour. This phenomenon of change of a liquid into vapors at any temperature below its boiling point is called evaporation.

Case Study 5:

5.) You must have observed that the rate of evaporation increases with–

an increase of surface area:
We know that evaporation is a surface phenomenon. If the surface area is increased, the rate of evaporation increases. For example, while putting clothes for drying up we spread them out.
an increase of temperature:

With the increase of temperature, more number of particles get enough kinetic energy to go into the vapour state.

In an open vessel, the liquid keeps on evaporating. The particles of liquid absorb energy from the surrounding to regain the energy lost during evaporation. This absorption of energy from the surroundings makes the surroundings cold. What happens when you pour some acetone (nail polish remover) on your palm? The particles gain energy from your palm or surroundings and evaporate causing the palm to feel cool. After a hot sunny day, people sprinkle water on the roof or open ground because the large latent heat of vaporization of water helps to cool the hot surface.

i.) Evaporation is surface phenomenon. True or false

ii.) As temperature increases the rate of evaporation is

a.) increases

b.) decreases

c.) remains constant

iii.) The rate of evaporation increases with

a.) Increase in wind speed

b.) Decrease in wind speed

c.) Does not have any effect from wind speed

iv.) What happens when you pour some acetone (nail polish remover) on your palm?

v.) We are able to sip hot tea from saucer than from cup. Why?

Answer key-5

iv.) The particles gain energy from your palm or surroundings and evaporate causing the palm to feel cool.

v.) We are able to sip hot tea from saucer than from cup. This is because saucer has large surface area, due to large surface area as compare to cut area tea evaporates at faster rate.

Thank you It helped me a lot

Why smell of Perfume is not a matter?

Because there is no particle

Because their are perfume particles suspended in air

These all case study questions are really helpful . Thanks

This is my first I was so nervous but these questions help me alot thank you

Smell of perfume is a matter because it have gas particles means perfume particles

We have a strong team of experienced Teachers who are here to solve all your exam preparation doubts

Justify the statement “industrialisation and urbanisation go hand in hand” in details, creative hindi worksheet for lkg students in pdf, west bengal board class 9 bengali radharani solution, 10 anuched lekhan in hindi for class 10th students.

Username or Email Address

Remember Me

myCBSEguide

Class 9 Science Case...

Class 9 Science Case Study Questions

Table of Contents

myCBSEguide App

Download the app to get CBSE Sample Papers 2023-24, NCERT Solutions (Revised), Most Important Questions, Previous Year Question Bank, Mock Tests, and Detailed Notes.

If you are wondering how to solve class 9 science case study questions, then myCBSEguide is the best platform to choose. With the help of our well-trained and experienced faculty, we provide solved examples and detailed explanations for the recently added Class 9 Science case study questions.

You can find a wide range of solved case studies on myCBSEguide, covering various topics and concepts. Class 9 Science case studies are designed to help you understand the application of various concepts in real-life situations.

The rationale behind Science

Science is crucial for Class 9 students’ cognitive, emotional, and psychomotor development. It encourages curiosity, inventiveness, objectivity, and aesthetic sense.

In the upper primary stage, students should be given a variety of opportunities to engage with scientific processes such as observing, recording observations, drawing, tabulating, plotting graphs, and so on, whereas in the secondary stage, abstraction and quantitative reasoning should take a more prominent role in science teaching and learning. As a result, the concept of atoms and molecules as matter’s building units, as well as Newton’s law of gravitation, emerges.

Science is important because it allows Class 9 Science students to understand the world around us. It helps to find out how things work and to find solutions to problems at the Class 9 Science level. Science is also a source of enjoyment for many people. It can be a hobby, a career, or a source of intellectual stimulation.

Case study questions in Class 9 Science

The inclusion of case study questions in Class 9 science CBSE is a great way to engage students in critical thinking and problem-solving. By working through real-world scenarios, Class 9 Science students will be better prepared to tackle challenges they may face in their future studies and careers. Class 9 Science Case study questions also promote higher-order thinking skills, such as analysis and synthesis. In addition, case study questions can help to foster creativity and innovation in students. As per the recent pattern of the Class 9 Science examination, a few questions based on case studies/passages will be included in the CBSE Class 9 Science Paper. There will be a paragraph presented, followed by questions based on it.

Examples of Class 9 science class case study questions

Class 9 science case study questions have been prepared by myCBSEguide’s qualified teachers. Class 9 case study questions are meant to evaluate students’ knowledge and comprehension of the material. They are not intended to be difficult, but they will require you to think critically about the material. We hope you find Class 9 science case study questions beneficial and that they assist you in your exam preparation.

The following are a few examples of Class 9 science case study questions.

Class 9 science case study question 1

due to its high compressibility
large volumes of a gas can be compressed into a small cylinder
transported easily
all of these
shape, volume
volume, shape
shape, size
size, shape
the presence of dissolved carbon dioxide in water
the presence of dissolved oxygen in the water
the presence of dissolved Nitrogen in the water
liquid particles move freely
liquid have greater space between each other
both (a) and (b)
none of these
Only gases behave like fluids
Gases and solids behave like fluids
Gases and liquids behave like fluids
Only liquids are fluids

Answer Key:

(d) all of these
(a) shape, volume
(b) the presence of dissolved oxygen in the water
(c) both (a) and (b)
(c) Gases and liquids behave like fluids

Class 9 science case study question 2

12/32 times
18 g of O 2
18 g of CO 2
18 g of CH 4
1 g of CO 2
1 g of CH 4 CH 4
2 moles of H2O
20 moles of water
6.022 × 1023 molecules of water
1.2044 × 1025 molecules of water
(I) and (IV)
(II) and (III)
(II) and (IV)
Sulphate molecule
Ozone molecule
Phosphorus molecule
Methane molecule
(c) 8/3 times
(d) 18g of CH 4
(c) 1g of H 2
(d) (II) and (IV)
(c) phosphorus molecule

Class 9 science case study question 3

collenchyma
chlorenchyma
It performs photosynthesis
It helps the aquatic plant to float
It provides mechanical support
Sclerenchyma
Collenchyma
Epithelial tissue
Parenchyma tissues have intercellular spaces.
Collenchymatous tissues are irregularly thickened at corners.
Apical and intercalary meristems are permanent tissues.
Meristematic tissues, in its early stage, lack vacuoles, muscles
(I) and (II)
(III) and (I)
Transpiration
Provides mechanical support
Provides strength to the plant parts
None of these
(a) Collenchyma
(b) help aquatic plant to float
(b) Sclerenchyma
(d) Only (III)
(c) provide strength to plant parts

Cracking Class 9 Science Case Study Questions

There is no one definitive answer to Class 9 Science case study questions. Every case study is unique and will necessitate a unique strategy. There are, nevertheless, certain general guidelines to follow while answering case study questions.

To begin, double-check that you understand the Class 9 science case study questions. Make sure you understand what is being asked by reading it carefully. If you’re unclear, seek clarification from your teacher or tutor.
It’s critical to read the Class 9 Science case study material thoroughly once you’ve grasped the question. This will provide you with a thorough understanding of the problem as well as the various potential solutions.
Brainstorming potential solutions with classmates or other students might also be beneficial. This might provide you with multiple viewpoints on the situation and assist you in determining the best solution.
Finally, make sure your answer is presented simply and concisely. Make sure you clarify your rationale and back up your claim with evidence.

A look at the Class 9 Science Syllabus

The CBSE class 9 science syllabus provides a strong foundation for students who want to pursue a career in science. The topics are chosen in such a way that they build on the concepts learned in the previous classes and provide a strong foundation for further studies in science. The table below lists the topics covered in the Class 9 Science syllabus of the Central Board of Secondary Education (CBSE). As can be seen, the Class 9 science syllabus is divided into three sections: Physics, Chemistry and Biology. Each section contains a number of topics that Class 9 science students must study during the course.

CBSE Class 9 Science (Code No. 086)

Theme: Materials Unit I: Matter-Nature and Behaviour Definition of matter; solid, liquid and gas; characteristics – shape, volume, density; change of state-melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation. Nature of matter: Elements, compounds and mixtures. Heterogeneous and homogenous mixtures, colloids and suspensions. Particle nature and their basic units: Atoms and molecules, Law of constant proportions, Atomic and molecular masses. Mole concept: Relationship of mole to mass of the particles and numbers. Structure of atoms: Electrons, protons and neutrons, valency, the chemical formula of common compounds. Isotopes and Isobars.

Theme: The World of the Living Unit II: Organization in the Living World Cell – Basic Unit of life: Cell as a basic unit of life; prokaryotic and eukaryotic cells, multicellular organisms; cell membrane and cell wall, cell organelles and cell inclusions; chloroplast, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus; nucleus, chromosomes – basic structure, number. Tissues, Organs, Organ System, Organism: Structure and functions of animal and plant tissues (only four types of tissues in animals; Meristematic and Permanent tissues in plants).

Theme: Moving Things, People and Ideas Unit III: Motion, Force and Work Motion: Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, derivation of equations of motion by graphical method; elementary idea of uniform circular motion. Force and Newton’s laws: Force and Motion, Newton’s Laws of Motion, Action and Reaction forces, Inertia of a body, Inertia and mass, Momentum, Force and Acceleration. Elementary idea of conservation of Momentum. Gravitation: Gravitation; Universal Law of Gravitation, Force of Gravitation of the earth (gravity), Acceleration due to Gravity; Mass and Weight; Free fall. Floatation: Thrust and Pressure. Archimedes’ Principle; Buoyancy. Work, energy and power: Work done by a Force, Energy, power; Kinetic and Potential energy; Law of conservation of energy. Sound: Nature of sound and its propagation in various media, speed of sound, range of hearing in humans; ultrasound; reflection of sound; echo.

Theme: Food Unit IV: Food Production Plant and animal breeding and selection for quality improvement and management; Use of fertilizers and manures; Protection from pests and diseases; Organic farming.

PRESCRIBED BOOKS:

Science-Textbook for class IX-NCERT Publication
Assessment of Practical Skills in Science-Class IX – CBSE Publication
Laboratory Manual-Science-Class IX, NCERT Publication
Exemplar Problems Class IX – NCERT Publication

myCBSEguide: A true helper

There are numerous advantages to using myCBSEguide to achieve the highest results in Class 9 Science.

myCBSEguide offers high-quality study materials that cover all of the topics in the Class 9 Science curriculum.
myCBSEguide provides practice questions and mock examinations to assist students in the best possible preparation for their exams.
On our myCBSEguide app, you’ll find a variety of solved Class 9 Science case study questions covering a variety of topics and concepts. These case studies are intended to help you understand how certain principles are applied in real-world settings
myCBSEguide is that the study material and practice problems are developed by a team of specialists who are always accessible to assist students with any questions they may have. As a result, students may be confident that they will receive the finest possible assistance and support when studying for their exams.

So, if you’re seeking the most effective strategy to study for your Class 9 Science examinations, myCBSEguide is the place to go!

Test Generator

Create question paper PDF and online tests with your own name & logo in minutes.

Question Bank, Mock Tests, Exam Papers, NCERT Solutions, Sample Papers, Notes

Competency Based Learning in CBSE Schools
Class 11 Physical Education Case Study Questions
Class 11 Sociology Case Study Questions
Class 12 Applied Mathematics Case Study Questions
Class 11 Applied Mathematics Case Study Questions
Class 11 Mathematics Case Study Questions
Class 11 Biology Case Study Questions
Class 12 Physical Education Case Study Questions

Save my name, email, and website in this browser for the next time I comment.

Bihar Board

SRM University

Ap inter results.

AP Board Results 2024
UP Board Result 2024
CBSE Board Result 2024
MP Board Result 2024
Rajasthan Board Result 2024
Karnataka Board Result
Shiv Khera Special
Education News
Web Stories
Current Affairs
नए भारत का नया उत्तर प्रदेश
School & Boards
College Admission
Govt Jobs Alert & Prep
GK & Aptitude
CBSE Class 9 Study Material

CBSE Class 9 Science Important Case Study Questions with Answers for Term 2 Exam 2022 (PDF)

Check important case study questions of cbse class 9 science to prepare for the cbse term 2 exam 2022. all these questions have been put together by subject experts..

CBSE Class 9 Term 2 Exam 2022: Important case based questions for CBSE Class 9 Science are provided here students to prepare for the upcoming Term 2 Exam 2022. All the questions provided below are curated by the subject experts. These questions are really helpful to revise important concepts and prepare the case study questions for the exam. Answers to all questions have been provided for reference. So, students should practice the chapter-wise questions to clearly understand the right way to attempt the case based questions. Download the chapter-wise questions in PDF.

Check some of the important case study questions below:

Q. Read the following and answer the questions :

A student was asked by his teacher to verify the law of conservation of mass in the laboratory. He prepared 5% aqueous solutions of NaCl and Na 2 SO 4 . He mixed 10 mL of both these solutions in a conical flask. He weighed the flask on a balance. He then stirred the flask with a rod and weighed it after sometime. There was no change in mass.

Was the student able to verify the law of conservation of mass?
If not, what was the mistake committed by him?
In your opinion, what he should have done?
What is the molar mass of Na 2 SO 4 ?
No, he could not verify the law of conservation of mass in-spite of the fact that there was no change in mass.
No chemical reaction takes place between NaCl and Na 2 SO 4 . This means that no reaction actually took place in the flask.
He should have performed the experiment by using aqueous solutions of BaCl 2 and Na 2 SO 4 . A chemical reaction takes place in this case and a white precipitate of BaSO 4 is formed.
Will the weight of the precipitate be the same as that of the reactants before mixing?
If not, what she should have done?
Which law of chemical combination does this support?
State the law of conservation of mass.
No, it will not be the same.
She should have weighed the total contents of the beaker after the reaction and not the precipitate alone.
It supports the law of conservation of mass.
Mass can neither be created nor destroyed during a chemical reaction.

Get here latest School , CBSE and Govt Jobs notification in English and Hindi for Sarkari Naukari and Sarkari Result . Download the Jagran Josh Sarkari Naukri App . Check Board Result 2024 for Class 10 and Class 12 like CBSE Board Result , UP Board Result , Bihar Board Result , MP Board Result , Rajasthan Board Result and Other States Boards.

IAF Agniveer Result 2024
AP Intermediate Result 2024
NDA Admit Card 2024
resultsbie.ap.gov.in Results 2024
AP Inter Result 2024 Link
Manabadi Inter Results 2024
Manabadi AP Inter Result 2024
Manabadi Inter Results 2024 AP
AP Inter Results 2024 with Jagran Josh
AP Inter Toppers List 2024
CBSE Study Material
CBSE Class 9

Latest Education News

Lok Sabha Election 2024 Dates: इस बार 97 करोड़ वोटर्स करेंगे मतदान, फेज-वाइज फुल शेड्यूल यहां देखें

IPL 2024: सूर्या ने सीजन की दूसरी सबसे तेज फिफ्टी के साथ बनाया एक और बड़ा रिकॉर्ड

Fastest 50s In IPL History: आईपीएल इतिहास के सबसे तेज़ अर्द्धशतक की पूरी लिस्ट यहां पढ़े

Who Won Yesterday IPL Match: LSG vs DC, Match 26, Check All Details and Latest Points Table

[Current] Orange Cap and Purple Cap Holders in IPL 2024

[Today] IPL 2024 Points Table: Team Rankings and Net Run Rate

(Updated) LSG vs DC Head to Head in IPL: Check Stats, Records and Results

NIOS 12th Hindi Syllabus 2023-24: Download Subject-wise PDF

Only eagle eyed readers can spot the magnet on the beach in 5 seconds!

NIOS Class 10th Social Science Syllabus 2023-24: Download Subject-wise PDF

एयरफोर्स अग्निवीर रिजल्ट 2024 OUT: जारी हुआ एयरफोर्स अग्निवीर परीक्षा का परिणाम, agnipathvayu.cdac.in से करें डाउनलोड

CUET PG Result 2024: आज रात जारी होंगे सीयूईटी पीजी परीक्षा के परिणाम, यूजीसी चेयरमैन ने दी जानकारी

Picture Puzzle IQ Test: Use Your Sharpest Eyes To Spot A Magnet In 12 Seconds!

Kerala Bank Recruitment 2024 for 479 Clerk and Office Attendant Posts, Apply Online at keralapsc.gov.in

NIOS 12th Date Sheet 2024: Check Stream-Wise Exam Schedule; Download FREE PDF

NIOS 10th Date Sheet 2024: Check Subject-wise Exam Schedule; Download FREE PDF

IAF Agniveer Result 2024 Declared at agnipathvayu.cdac.in, Check Indian Air Force Agnivayu Login Link Here

Optical Illusion: Find the toad in the picture in 6 seconds!

CUET PG Result 2024 Live Updates: Results By Tonight Says UGC Chief, Get Details Here

Who is Aroh Barjatya? Meet the Indian-born researcher who led NASA’s Recent Solar Mission

NCERT Solutions for Class 9 Science Chapter 1 Matter in Our Surroundings

NCERT Solutions for Class 9 Science (chemistry) Chapter 1 Matter in Our Surroundings are given below. In these solutions, we have answered all the intext and exercise questions provided in NCERT class 9 science textbook. Class 9 NCERT Solutions Science Chapter 1 provided in this article are strictly based on the CBSE syllabus and curriculum. Students can easily download these solutions in PDF format for free from our app.

Class 9 Science Chapter 1 Textbook Questions and Answers

Intext Questions

Question 1: Which of the following are matter?

Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume.

Answer: Chair, air, almonds, and cold-drink are matters.

Explanation: Things that occupy space and have some mass are called matter. Since chair, air, almonds and cold-drink occupy some space and have some mass, so these are matter.

Question 2: Give reasons for the following observation:

The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close.

Answer: The smell of hot sizzling food reaches severed meters away, as the particles of hot food have more kinetic energy and hence the rate of diffusion is more than the particles of cold food.

Smell of anything comes because of gases emanating from the given thing. The smell reaches to us because of diffusion of gas. The rate of diffusion increases with increase in temperature. This happens because of higher kinetic energy due to higher temperature. That is why smell of hot sizzling food reaches to us from several feet. On the other hand, the kinetic energy of gases emanating from cold food is low because of lower temperature. Due to this, we need to move closer to a cold food to take its smell.

Question 3: A diver is able to cut through water in a swimming pool. Which property of matter does this observation show?

Answer: A diver is able to cut through water in a swimming pool. This shows that the particles of water have intermolecular space and has less force of attraction.

Question 4: What are the characteristics of particles of matter?

Answer: The characteristics of particles of matter are:

Particles of matter have spaces between them.
Particles of matter are continuously moving.
Particles of mater attract each other.

Question 1: The mass per unit volume of a substance is called density (density = mass/volume). Arrange the following in order of increasing density − air, exhaust from chimney, honey, water, chalk, cotton, and iron.

Answer: The given substances in the increasing order of their densities can be represented as:

Air < Exhaust from chimney < Cotton < Water < Honey < Chalk < Iron

Explanation: Air is the mixture of gases. Chimney exhaust is also a mixture of gases; along with some heavier particles, such as ash. This makes the density of chimney exhaust more than air. Cotton is a porous solid and which has lot of air trapped within pores. This makes its volume more than water. Therefore, it is less dense than water.

Question 2: (a) Tabulate the differences in the characteristics of states of matter. (b) Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density.

Answer: (a) The differences in the characteristics of states of matter are given in the following table.

NCERT Solutions for Class 9 Science Chapter 1 Matter in Our Surroundings image 1

The difference in the characteristics of the three states of matter.

NCERT Solutions for Class 9 Science Chapter 1 Matter in Our Surroundings image 2

(b) Rigidity: The greatest force of attraction between particles and close packing of particles make solids rigid. Rigidity is one of the unique properties of solids. Because of rigidity, a solid can resist from getting distorted. Because of rigidity a solid has definite shape and volume. Rigidity is negligible in fluid and gas.

Compressibility: Compressibility is one of the most important characteristics of gas. Because of lot of space between particles, a gas can be compressed to a great extent.

Liquid and solid cannot be compressed because of the least space between their particles.

Fluidity: The ability to flow is called fluidity. The less force of attraction and more space between particles make liquid and gas to flow. That’s why liquid and gas are called fluid.

Filling of a gas container: Liquids do not fill a gas container completely, while gases fill the gas container completely in which it is kept. This is because the particles of gas can move in all the directions.

Shape: Solids have fixed shape. Liquid and gas take the shape of the container in which they are kept. This happens because of less force of attraction and more kinetic energy between particles of liquids and negligible force of attraction and highest kinetic energy between particles of gas.

Kinetic energy: The kinetic energy of particles of solid is the minimum. They only vibrate at their fixed position. The kinetic energy of particles of liquid is more than that of solid. But they can slide above one another. The kinetic energy of particles of gas is the maximum.

Density: The mass per unit volume of a substance is called density. The density of solid is highest, of liquid is less than solid and of gas is minimum.

Question 3: Give reasons: (a) A gas fills completely the vessel in which it is kept. (b) A gas exerts pressure on the walls of the container. (c) A wooden table should be called a solid. (d) We can easily move our hand in air, but to do the same through a solid block of wood, we need a karate expert.

Answer: (a) There is little attraction between particles of gas. Thus, gas particles move freely in all directions. Therefore, gas completely fills the vessel in which it is kept.

(b) Because of negligible force of attraction between particles of gas, the particles of gas have the highest kinetic energy. These properties enable the particles of gas to move in all directions and hit the walls of container from all sides. Because of this a gas exerts pressure on the walls of the container in which it is kept.

(c) A wooden table has a definite shape and volume. It is very rigid and cannot be compressed i.e., it has the characteristics of a solid. Hence, a wooden table should be called a solid.

(d) Particles of air have large spaces between them. On the other hand, wood has little space between its particles. Also, it is rigid. For this reason, we can easily move our hands in air, but to do the same through a solid block of wood, we need a karate expert.

Since, air is gas, so its particles are loosely packed and there is negligible force of attraction between its particles. Because of that we can easily move our hand in air. But wood is a solid, so the force of attraction between its particles is greatest. The particles of wooden block are closely packed. That’s why we cannot move our hand through a solid block of wood. However, a karate expert can exert required pressure to break the great force of attraction of the particles of a solid wooden block.

Question 4: Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why.

Answer: During freezing of water, some space between the particles of water is left vacant with some air trapped between them. These empty spaces having air in them makes the density of ice; lower than that of water. That’s why ice floats on water.

Question 1: Convert the following temperatures into the Celsius scale. (a) 300 K (b) 573 K

Answer: (a) 300 K = (300 − 273)°C = 27°C (b) 573 K = (573 − 273)°C = 300°C

Question 2: What is the physical state of water at (a) 250°C (b) 100°C

Answer: (a) Water at 250°C exists in gaseous state.

(b) At 100°C, water can exist in both liquid and gaseous form. At this temperature, after getting the heat equal to the latent heat of vaporization, water starts changing from liquid state to gaseous state.

Question 3: For any substance, why does the temperature remain constant during the change of state?

Answer: During a change of state, the temperature remains constant. This is because all the heat supplied to increase the temperature is utilized (as latent heat) in changing the state by overcoming the forces of attraction between the particles. Therefore, this heat does not contribute in increasing the temperature of the substance.

Question 4: Suggest a method to liquefy atmospheric gases.

Answer: Atmospheric gas is liquefied by increasing pressure and decreasing temperature.

PAGE NO. 10

Question 1: Why does a desert cooler cool better on a hot dry day?

Answer: Desert cooler works on the basis of evaporation. In hot and dry days the moisture level is very low in atmosphere which increases the rate of evaporation. Because of faster evaporation, cooler works well. That’s why desert cooler cool better on a hot dry day.

When a liquid evaporates, the particles of the liquid absorb energy from the surroundings to compensate the loss of energy during evaporation. This makes the surroundings cool.

In a desert cooler, the water inside it is made to evaporate. This leads to absorption of energy from the surroundings, thereby cooling the surroundings. Again, we know that evaporation depends on the amount of water vapour present in air (humidity). If the amount of water vapour present in air is less, then evaporation is more. On a hot dry day, the amount of water vapour present in air is less. Thus, water present inside the desert cooler evaporates more, thereby cooling the surroundings more. That is why a desert cooler cools better on a hot dry day.

Question 2: How does water kept in an earthen pot (matka) become cool during summers?

Answer: Water from porous wall of earthen pot evaporates continuously, which lowers the temperature of water kept in the earthen pot. In summer moisture level is very low in the atmosphere, which increases the rate of evaporation as evaporation is inversely proportional to the moisture level in atmosphere. That is why in summer water kept in earthen pot becomes cool.

Question 3: Why does our palm feel cold when we put some acetone or petrol or perfume on it?

Answer: When we put some acetone or petrol or perfume on our palm, it evaporates. During evaporation, particles of the liquid absorb energy from the surrounding or the surface of the palm to compensate for the loss of energy, making the surroundings cool. Hence, our palm feels cold when we put some acetone or petrol or perfume on it.

Question 4: Why are we able to sip hot tea or milk faster from a saucer than a cup?

Answer: When hot tea or milk is kept in a saucer, the liquid is exposed over a larger surface area as compared to in case of the liquid being kept in a cup. The larger surface area enables the faster cooling. That’s why we are able to sip hot tea or milk faster from a saucer rather than from a cup.

Question 5: What type of clothes should we wear in summers?

Answer: In summer, it is preferred to wear light-coloured cotton clothes because light colour reflects heat and cotton materials have pores that absorb sweat, facilitating their evaporation hence causing a cooling effect in the skin.

Question 1: Convert the following temperatures into the Celsius scale. (a) 293 K (b) 470 K

Answer: Temperature in Celsius scale = Temperature in Kelvin scale – 273

(a) 293K= (293 – 273)°C = 20°C

(b) 470K= (470 – 273)°C = 197°C

Question 2: Convert the following temperatures into the Kelvin scale. (a) 25°C (b) 373°C

Answer: Temperature in Kelvin scale = Temperature in Celsius scale + 273

(a) 25°C = (25+273)K = 298K

(b) 373°C = (373+273)K = 646K

Question 3: Give reasons for the following observations. (a) Naphthalene balls disappear with time without leaving any solid. (b) We can get the smell of perfume while sitting several metres away.

Answer: (a) At room temperature, naphthalene balls undergo sublimation wherein they directly get converted from a solid to a gaseous state without having to undergo the intermediate state, i.e., the liquid state.

(b) Perfumes vaporize very fast and its vapours diffuse into air easily. That is why we can smell perfume sitting several meters away.

Question 4: Arrange the following in increasing order of forces of attraction between the particles – water, sugar, oxygen.

Answer: Oxygen < Water < Sugar.

Explanation: Oxygen is a gas, thus force of attraction is negligible between particles. Water is a liquid, thus force of attraction between particles is more than liquid and less than solid. Sugar is a solid, thus force of attraction between particles is greatest.

Question 5: What is the physical state of water at — (a) 25°C (b) 0°C (c) 100°C?

Answer: (a) At 25°C – water is in liquid state. (b) At 0°C – water is in solid state. (c) At 100°C – water is in transition state, i.e. in liquid and gas both.

Question 6: Give two reasons to justify: (a) water at room temperature is a liquid. (b) an iron almirah is a solid at room temperature.

Answer: (a) At room temperature (25 °C), water is a liquid because it has the following characteristic of liquid:

(i) Water has definite volume, but not definite shape as it takes the shape of the container in which it is kept. (ii) Water flows at room temperature.

(b) An iron almirah is a solid at room temperature because: (i) It has definite shape. (ii) It has definite volume.

Question 7: Why is ice at 273 K more effective in cooling than water at the same temperature?

Answer: At 273K ice requires more latent heat to melt into water, while water at 273K requires less latent heat; to come to the room temperature. So, ice at 273 K is more effective in cooling than water at the same temperature.

Question 8: What produces more severe burns, boiling water or steam?

Answer: Steam produces more severe burns than boiling water. This is because steam has more energy than boiling water, present in it in the form of latent heat of vaporization.

Question 9: Name A, B, C, D, E and F in the following diagram showing change in its state:

NCERT Solutions for Class 9 Science Chapter 1 Matter in Our Surroundings image 3

Answer: A: Melting (or) fusion (or) liquefaction B: Evaporation (or) vaporization C: Condensation D: Solidification E: Sublimation F: Sublimation

Class 9 Science NCERT Solutions Chapter 1 Matter in Our Surroundings

CBSE Class 9 Science NCERT Solutions Chapter 1 helps students to clear their doubts and to score good marks in the board exam. All the questions are solved by experts with a detailed explanation that will help students complete their assignments & homework. Having a good grasp over CBSE NCERT Solutions for Class 9 Science will further help the students in their preparation for board exams and other competitive exams such as NTSE, Olympiad, etc.

NCERT Solutions for Class 9 Science Chapter 1 PDF

Below we have listed the topics discussed in NCERT Solutions for Class 9 Science Chapter 1. The list gives you a quick look at the different topics and subtopics of this chapter.

Case Study Questions for Class 9 Science Chapter 1 Matter in Our Surroundings

Last modified on: 18 hours ago
Reading Time: 6 Minutes

Here we are providing case study questions for class 9 science chapter 12 sound. Students are suggested to go through each and every case study questions for better understanding of the chapter.

Case Study/Passage Based Questions:

Question 1:

Read the following passage and answer the questions given below.

Every matter is made up of tiny particles. These particles are so tiny that they can’t be seen with naked eyes.

The three characteristics shown by particles of matter are as follows:

(i) There are small voids between particles in a matter. This characteristic is the concept behind the solubility of a substance in other substances.

(ii) Particles of matter show continuous random movements, that is they possess kinetic energy. The spreading of ink in a beaker of glass, smell of agarbattis, etc. are few illustrations that show the movement of particles of a substance.

(iii) The particles of matter attract each other with a force called interparticle force of attraction. Read the given passage carefully and give the answer of the following questions:

Q 1. Spreading of fragrance of a burning incense stick in a room shows that:

a. particles of matter have spaces between them.

b. particles of matter attract each other.

c. particles of matter are constantly moving.

d. None of the above

Q 2. What happens when we add sugar to water?

a. Volume of water doubles.

b. Volume of water decreases

c. Volume of water remains the same.

Q 3. A stream of water cannot be cut by fingers. Which property of matter does this observation show?

a. Particles of matter attract each other.

b. Particles of matter have spaces between them.

c. Particles of matter are continuously moving.

Q 4. When we put some crystals of potassium permanganate in a beaker containing water, we observe that after some time, the whole water turns pink. This intermixing of particles of two different types of matter on their own is called:

a. Brownian motion

c. sublimation

d. diffusion

Q 5. Why is the rate of diffusion of liquids higher than that of solids?

a. In the liquid state, particles are tightly packed as compared to solids.

b. In the liquid state, particles move freely as compared to solids.

c. In solid state, particles have least force of attraction between the particles.

d. In solid state, particles cannot be compressed easily.

(c) particles of matter are constantly moving.
(c) Volume of water remains the same.
(a) Particles of matter attract each other.
(d) diffusion
(b) In the liquid state, particles move freely as compared to solids

Download cbse books.

Exam Special Series:

Sample Question Paper for CBSE Class 10 Science (for 2024)
Sample Question Paper for CBSE Class 10 Maths (for 2024)
CBSE Most Repeated Questions for Class 10 Science Board Exams
CBSE Important Diagram Based Questions Class 10 Physics Board Exams
CBSE Important Numericals Class 10 Physics Board Exams
CBSE Practical Based Questions for Class 10 Science Board Exams
CBSE Important “Differentiate Between” Based Questions Class 10 Social Science
Sample Question Papers for CBSE Class 12 Physics (for 2024)
Sample Question Papers for CBSE Class 12 Chemistry (for 2024)
Sample Question Papers for CBSE Class 12 Maths (for 2024)
Sample Question Papers for CBSE Class 12 Biology (for 2024)
CBSE Important Diagrams & Graphs Asked in Board Exams Class 12 Physics
Master Organic Conversions CBSE Class 12 Chemistry Board Exams
CBSE Important Numericals Class 12 Physics Board Exams
CBSE Important Definitions Class 12 Physics Board Exams
CBSE Important Laws & Principles Class 12 Physics Board Exams
10 Years CBSE Class 12 Chemistry Previous Year-Wise Solved Papers (2023-2024)
10 Years CBSE Class 12 Physics Previous Year-Wise Solved Papers (2023-2024)
10 Years CBSE Class 12 Maths Previous Year-Wise Solved Papers (2023-2024)
10 Years CBSE Class 12 Biology Previous Year-Wise Solved Papers (2023-2024)
ICSE Important Numericals Class 10 Physics BOARD Exams (215 Numericals)
ICSE Important Figure Based Questions Class 10 Physics BOARD Exams (230 Questions)
ICSE Mole Concept and Stoichiometry Numericals Class 10 Chemistry (65 Numericals)
ICSE Reasoning Based Questions Class 10 Chemistry BOARD Exams (150 Qs)
ICSE Important Functions and Locations Based Questions Class 10 Biology
ICSE Reasoning Based Questions Class 10 Biology BOARD Exams (100 Qs)

✨ Join our Online JEE Test Series for 499/- Only (Web + App) for 1 Year

✨ Join our Online NEET Test Series for 499/- Only for 1 Year

Discover more from Gurukul of Excellence

Subscribe now to keep reading and get access to the full archive.

Type your email…

If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

To log in and use all the features of Khan Academy, please enable JavaScript in your browser.

Unit 2: Matter in Our Surroundings

Matter and particles that make up matter..

Characteristics of particles of matter (Opens a modal)
Characteristics of particles of matter Get 4 of 5 questions to level up!

States of matter

States of matter (Opens a modal)
Effect of temp and pressure on state change (Opens a modal)
Evaporation and its cooling effect (Opens a modal)
The states of matter. Get 3 of 4 questions to level up!
Evaporation and its cooling effects Get 5 of 7 questions to level up!

New QB365-SLMS
NEET Materials
JEE Materials
Banking first yr Materials
TNPSC Materials
DIPLOMA COURSE Materials
5th Standard Materials
12th Standard Materials
11th Standard Materials
10th Standard Materials
9th Standard Materials
8th Standard Materials
7th Standard Materials
6th Standard Materials
12th Standard CBSE Materials
11th Standard CBSE Materials
10th Standard CBSE Materials
9th Standard CBSE Materials
8th Standard CBSE Materials
7th Standard CBSE Materials
6th Standard CBSE Materials
Tamilnadu Stateboard
Scholarship Exams
Scholarships

Class 9th Science - Is Matter Around Us Pure Case Study Questions and Answers 2022 - 2023

By QB365 on 09 Sep, 2022

QB365 provides a detailed and simple solution for every Possible Case Study Questions in Class 9th Science Subject - Is Matter Around Us Pure, CBSE. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

QB365 - Question Bank Software

Is matter around us pure case study questions with answer key.

9th Standard CBSE

Final Semester - June 2015

(ii) What would you expect to see, if the ink contains three different coloured components? (a) We will not see any band on the filter paper. (b) We would see three bands on the filter paper at various lengths. (c) We would see infinite bands on the filter paper. (d) We would see single band on the filter paper. iii) Give one application where you can use this technique. (a) To separate salt from sand (b) To separate wheat from husk (c) To separate oil from water (d) To separate drugs from blood. (iv) For the separation of what kind of substances is the above process used ? (a) For the separation of insoluble substances (b) For the separation of single solute that dissolves in single solvent. (c) For the separation of those solutes that dissolve in the same solvent. (d) For the separation of those solutes that dissolve in the different solvents. (v) What is chromatography ? (a) It is an agricultural method to separate grains (b) A method to separate magnetic impurities from non-magnetic impurities (c) The process of separating the suspended particles of an insoluble substance (d) Method of separating and identifying various components in a mixture, which are present in small trace quantities.

(ii) Oil from water.

(iii) Sodium chloride from its solution in water.

(iv) Camphor from salt.

(v) Cream from milk

(ii) Which type of substance can be separated by this method ? (a) Any solvent from its non-volatile solute. (b) The volatile solvent from its non-volatile solute. (c) The non-volatile solvent from its non-volatile solute. (d) The volatile solvent from its volatile solute. (iii) What can we interpret about the nature of ink ?

(iv) Name the component which gets evaporated. ( a) Heating leads to the evaporation of water. (b) Heating leads to the evaporation of dyes. (c) Heating leads to the filtration of water. (d) Heating leads to the distillation of dyes. (v) Define the process shown in the diagram (a) It is the process of conversion of a liquid into its vapours. (b) It is a process of separating insoluble component by filtering the solution (c) It is a process that separates a pure solid in the form of its crystals (d) It is a technique to separate two miscible liquids

(ii) One of the following does not undergo sublimation. This one is :

(iii) The conversion of a solid into vapours without passing through the liquid state is called :

(iv) When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporisation :

(v) During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of :

*****************************************

Is matter around us pure case study questions with answer key answer keys.

(i) (c) Chromatography (ii) (b) We would see three bands on the filter paper at various lengths. (iii) (d) To separate drugs from blood. (iv) (c) For the separation of those solutes that dissolve in the same solvent. (v) (d) Method of separating and identifying various components in a mixture, which are present in small trace quantities.

(i) (b) Sedimentation and Decantation. (ii) (c) Separating funnel (iii) (d) Evaporation (iv) (c) Sublimation (v) (d) Centrifugation.

(i) (a) Boiling (ii) (b) The volatile solvent from its non-volatile solute. (iii) (d) Ink is a mixture of dyes in water. (iv) (a) Heating leads to the evaporation of water. (v) (a) It is the process of conversion of a liquid into its vapours.

(i) (c) sublimation (ii) (b) sodium chloride (iii) (c) sublimation (iv) (d) does not rise at all (v) (d) evaporation.

Related 9th Standard CBSE Science Materials

9th standard cbse syllabus & materials, class 10th social science - pastoralists case study questions and answers 2022 - 2023, class 9th social science - forest society and colonialism case study questions and answers 2022 - 2023, class 9th social science - nazism and the rise of hitler case study questions and answers 2022 - 2023, class 9th social science - socialism in europe and the russian revolution case study questions and answers 2022 - 2023, class 9th social science - the french revolution case study questions and answers 2022 - 2023, class 9th maths - probability case study questions and answers 2022 - 2023, class 9th maths - statistics case study questions and answers 2022 - 2023, class 9th maths - surface case study questions and answers 2022 - 2023, class 9th maths - linear equations in two variables case study questions and answers 2022 - 2023, class 9th maths - coordinate geometry case study questions and answers 2022 - 2023, rs aggarwal 9th standard maths ncert solutions for probability, rs aggarwal 9th standard maths ncert solutions for statistics, rs aggarwal 9th standard maths ncert solutions for surface areas volumes, rs aggarwal 9th standard maths ncert solutions for heron's formula, rs aggarwal 9th standard maths ncert solutions for constructions.

Class VI to XII

Tn state board / cbse, 3000+ q&a's per subject, score high marks.

9th Standard CBSE Study Materials

9th Standard CBSE Subjects

CBSE Expert

Case Study Questions of Class 9 Science PDF Download

Download PDF Case Study Questions of Class 9 Science to prepare for the upcoming CBSE Class 9 Exams Exam 2023-24. With the help of our well-trained and experienced faculty, we provide solved examples and detailed explanations for the recently added Class 9 Science case study questions .

Case study questions are based on real or hypothetical scenarios that require students to analyze, evaluate, and apply scientific concepts to solve problems or make informed decisions. They often present a detailed context, providing students with the opportunity to demonstrate their understanding of the subject matter beyond basic recall.

Table of Contents

Class 9 Science: Case Study Questions

Chapterwise Case Study Questions of Class 9 Science

Case Study Questions for Chapter 1 Matter in Our Surroundings
Case Study Questions for Chapter 2 Is Matter Around Us Pure?
Case Study Questions for Chapter 3 Atoms and Molecules
Case Study Questions for Chapter 4 Structure of Atom
Case Study Questions for Chapter 5 The Fundamental Unit of Life
Case Study Questions for Chapter 6 Tissues
Case Study Questions for Chapter 7 Diversity in Living Organisms
Case Study Questions for Chapter 8 Motion
Case Study Questions for Chapter 9 Force and Laws of Motion
Case Study Questions for Chapter 10 Gravitation
Case Study Questions for Chapter 11 Work and Energy
Case Study Questions for Chapter 12 Sound
Case Study Questions for Chapter 13 Why do we Fall ill
Case Study Questions for Chapter 14 Natural Resources
Case Study Questions for Chapter 15 Improvement in Food Resources

You can find a wide range of solved case studies on cbseexperts, covering various topics and concepts. Class 9 Science case studies are designed to help you understand the application of various concepts in real-life situations.

Class 9 Science Syllabus

Unit I: Matter-Nature and Behaviour

Definition of matter; solid, liquid, and gas; characteristics – shape, volume, density; change of statementing (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation.

Nature of matter: Elements, compounds, and mixtures. Heterogeneous and homogenous mixtures, colloids, and suspensions. Physical and chemical changes (excluding separating the components of a mixture).

Particle nature and their basic units: Atoms and molecules, Law of Chemical Combination, Chemical formula of common compounds, Atomic and molecular masses.

Structure of atoms: Electrons, protons and neutrons, Valency, Atomic Number and Mass Number, Isotopes and Isobars.

Unit II: Organization in the Living World

Cell – Basic Unit of life: Cell as a basic unit of life; prokaryotic and eukaryotic cells, multicellular organisms; cell membrane and cell wall, cell organelles and cell inclusions; chloroplast, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus; nucleus, chromosomes – basic structure, number.

Tissues, Organs, Organ System, Organism: Structure and functions of animal and plant tissues (only four types of tissues in animals; Meristematic and Permanent tissues in plants).

Unit III: Motio n, Force, and Work

Motion: Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, elementary idea of uniform circular motion.

Force and Newton’s laws: Force and Motion, Newton’s Laws of Motion, Action and Reaction forces, Inertia of a body, Inertia and mass, Momentum, Force and Acceleration.

Gravitation: Gravitation; Universal Law of Gravitation, Force of Gravitation of the earth (gravity), Acceleration due to Gravity; Mass and Weight; Free fall. Floatation: Thrust and Pressure. Archimedes’ Principle; Buoyancy.

Work, Energy and Power: Work done by a Force, Energy, power; Kinetic and Potential energy; Law of conservation of energy (excluding commercial unit of Energy).

Sound: Nature of sound and its propagation in various media, speed of sound, range of hearing in humans; ultrasound; reflection of sound; echo.

Unit IV: Food Production

Plant and animal breeding and selection for quality improvement and management; Use of fertilizers and manures; Protection from pests and diseases; Organic farming.

Books for Class 9 Science Exams

Benefits of Case Study Questions

Enhancing Analytical Skills : Case study questions challenge students to analyze complex scenarios, identify relevant information, and derive meaningful insights. By engaging with these questions, students develop critical analytical skills that are essential for scientific thinking and problem-solving.
Promoting Critical Thinking : Case study questions encourage students to think critically and evaluate different perspectives. They require students to reason, make logical deductions, and justify their answers with supporting evidence. This process helps in honing their critical thinking abilities, enabling them to approach problems from multiple angles.
Encouraging Practical Application of Concepts : By presenting real-world or hypothetical situations, case study questions promote the application of scientific concepts in practical scenarios. This application-based approach fosters a deeper understanding of the subject matter and helps students see the relevance of what they learn in the classroom to everyday life.

Case study questions of Class 9 Science provide students with an opportunity to apply their knowledge, enhance analytical skills, and think critically. By understanding the format, benefits, and effective strategies for answering case study questions, students can excel in this form of assessment. While challenges may arise, practicing time management, improving information extraction skills, and enhancing observation abilities will enable students to overcome these obstacles and perform well. Embracing case study questions as a valuable learning tool can contribute to a holistic understanding of scientific concepts and foster problem-solving abilities.

1. What is the purpose of case study questions in Class 9 Science?

Case study questions serve the purpose of evaluating a student’s understanding of scientific concepts, their ability to apply knowledge in real-life situations, and their analytical and critical thinking skills.

2. How can case study questions help improve analytical skills?

Case study questions require students to analyze complex scenarios, identify relevant information, and derive meaningful insights. Regular practice with such questions can significantly enhance analytical skills.

3. Are case study questions difficult to answer?

Case study questions can be challenging due to their comprehensive nature and the need for critical thinking. However, with practice and effective strategies, students can develop the skills necessary to answer them effectively.

Download India's best Exam Preparation App Now.

Key Features

Revision Notes
Important Questions
Previous Years Questions
Case-Based Questions
Assertion and Reason Questions

No thanks, I’m not interested!

Important Questions
Important Questions Class 9 Chemistry
Important Questions Class 9 Chemistry Chapter 1 Matter in our Surroundings

Class 9 Chemistry Chapter 1 - Matter in Our Surroundings Important Questions with Answers

Class 9 chemistry important questions with answers are provided here for Chapter1 – Matter in Our Surroundings. These important questions are based on CBSE board curriculum and correspond to the most recent Class 9 chemistry syllabus. By practicing these Class 9 important questions, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 9 Annual examinations.

Download Class 9 Chemistry Chapter 1 – Matter in Our Surroundings Important Questions with Answers PDF by clicking on the button below.

Recommended video, matter in our surroundings in one shot.

Class 9 Chapter1 – Matter in Our Surroundings Important Questions with Answers

Q1. A sample of water under study was found to boil at 102 ℃ at normal temperature and pressure. Is the water pure? Will this water freeze at 0 ℃? Comment.

The boiling point of pure water is 100 ∘ C, and the freezing point of pure water is 0 ∘ C. The water sample boils at 102 ∘ C at standard pressure. Thus, the water sample is not pure. It will freeze below 0 ∘ C.

Q2. A student heats a beaker containing ice and water. He measures the temperature of the content of the beaker as a function of time. Which of the following (Fig. 1.1) would correctly represent the result? Justify your choice.

When we heat the mixture, the energy supplied is utilized to melt the ice, and the temperature does not change until all the ice melts because of the latent heat of fusion. On further heating, the temperature of the water would increase.

So, graph (d) correctly represents the result.

Q3. Fill in the blanks:

(a) Evaporation of a liquid at room temperature leads to a _____ effect.

(b) At room temperature, the forces of attraction between the particles of solid substances are _____ than those which exist in the gaseous state.

(d) _____ is the change of gaseous state directly to solid state without going through the state.

(e) The phenomenon of the change of a liquid into the gaseous state at any temperature below its boiling point is called _____.

(a) Evaporation of a liquid at room temperature leads to a cooling effect.

(b) At room temperature, the forces of attraction between the particles of solid substances are stronger than those which exist in the gaseous state.

(d) Sublimation is the change of a gaseous state directly to a solid state without going through the liquid state.

(e) The phenomenon of changes of a liquid into the gaseous state at any temperature below its boiling point is called evaporation.

Q4. Match the physical quantities given in column A to their SI units given in column B:

Q5. Osmosis is a special kind of diffusion. Comment.

Osmosis is a special kind of diffusion because, in both cases, particles move from a higher concentration to a lower concentration. The only difference is that osmosis applies to the direction of the solvent only through the semi-permeable membrane where the solvent is water.

Q6. Classify the following into osmosis/diffusion

(a) Swelling up of a raisin on keeping in water.

(b) Spreading of the virus on sneezing.

(d) Shrinking of grapes kept in thick sugar syrup.

(e) Preserving pickles in salt.

(f) Spreading of the smell of cake being baked throughout the house.

(g) Aquatic animals use oxygen dissolved in water during respiration.

Q7. Water as ice has a cooling effect, whereas water as steam may cause severe burns. Explain these observations.

Water turns into ice when the temperature decreases to 0°C. Water turns into steam at 100°C when heat is supplied to the water. Water as steam has more latent heat, while water as liquid does not.

Hence, water as steam may cause severe burns, while water as ice has a cooling effect.

Q8. Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment.

The boiling point of water is 100°C. The temperature of boiling water does not rise; instead, a continuous supply of heat is used to turn water into steam. Hence, steam has a lot of latent heat than boiling water, which can cause severe burns. That’s why Alka felt intense heat from the puff of steam gushing out of the kettle’s spout.

Q9. A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator (temperature < 0 O C). If you could measure the temperature of the content of the tumbler, which of the following graphs (Fig. 1.2) would correctly represent the change in its temperature as a function of time.

Graph A represents the correct change in temperature as a function of time.

As the temperature of water falls to 0 °C first. Then it will be constant till all water turns into ice, and then it will decrease.

Q10. Look at Fig. 1.3 and suggest in which of the vessels A, B, C or D the rate of evaporation will be the highest? Explain.

The rate of evaporation increases with the increase in surface area and wind speed. The surface areas of vessels C, A and D are similar, but the wind speed is more above vessel C because of the fan. Hence the rate of evaporation will be highest in vessel C.

Q11. (a) Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid.

(b) Conversion of solid-state to liquid state is called fusion; what is meant by the latent heat of fusion?

(a) Vapour conversion to solid without changing into liquid is also known as ‘deposition’.

(b) Latent heat of fusion is the amount of heat required to convert a unit mass of the substance from a solid form to a liquid form without changing the temperature.

Long Answer Type Questions

Q1. You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with a well-labelled diagram.

Naphthalene is insoluble in water but soluble in benzene, while Ammonium chloride is soluble in water but insoluble in benzene. Naphthalene changes into vapours at room temperature, whereas ammonium chloride changes into vapours on heating.

Step 1: We will add water to the mixture and shake it vigorously to dissolve ammonium chloride.

Step 2: We will then filter the mixture. Naphthalene will be obtained as residue, whereas filtrate will contain ammonium chloride.

Step 3: We will crystallize the filtrate by heating it till a saturated solution of ammonium chloride is obtained.

Step 4: We will cool the hot saturated solution to get ammonium chloride crystals.

Q2. It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?

Priyanshi would be more comfortable than Ali. The reason is that we get a lot of sweat in our bodies on a hot summer day.

Cotton is a good absorber of water. It absorbs sweat from the body and provides a larger surface area for evaporation which causes a more cooling effect. Nylon does not absorb sweat, so the sweat does not evaporate, and Ali would feel uncomfortable.

Q3. You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?

Wet clothes dry up because of evaporation. The rate of evaporation increases with the increase in temperature, surface area and wind speed.

(a) We can spread the shirt on a wire to increase the evaporation rate.

(b) We can increase the evaporation rate by using a fan.

(c) If it is daytime, we can arrange the above combination in the sun so that an increase in temperature would increase the evaporation rate.

(d) If it is not daytime, we can use a hot iron to dry the shirt.

Q4. Comment on the following statements:

(a) Evaporation produces cooling.

(b) The rate of evaporation of an aqueous solution decreases with an increase in humidity.

(a) Evaporation produces cooling because the liquid that gets evaporated draws the latent heat of vaporisation from the other particle in contact with it.

(b) The rate of evaporation of an aqueous solution decreases with an increase in humidity because when the humidity is high, it is observed that the air possesses more water vapours. Due to this, it will not draw more water vapours. Therefore, it decreases with the increase in humidity.

(c) Sponge is considered as solid because it has a defined volume and shape. It is compressible because of tiny holes where the air is trapped.

Q5. Why does the temperature of a substance remain constant during its melting point or boiling point?

The temperature of a substance remains constant during its melting and boiling point because the change in any state of matter, as solid to liquid or liquid to gas, involves crossing the latent heat of fusion which causes a difference in the intermolecular spacing of the molecules in the substance.

Can Matter Change its State?

Register with BYJU'S & Download Free PDFs

Class 9 Science Case Study Questions Chapter 4 Structure of Atom

Post author: studyrate
Post published:
Post category: class 9th
Post comments: 0 Comments

Case study Questions on Class 9 Science Chapter 4 are very important to solve for your exam. Class 9 Science Chapter 4 Class 9 Science Case Study Questions have been prepared for the latest exam pattern. You can check your knowledge by solving case study-based questions for Class 9 Science Chapter 4 Structure of Atom

Join our Telegram Channel, there you will get various e-books for CBSE 2024 Boards exams for Class 9th, 10th, 11th, and 12th.

In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Structure of Atom Case Study Questions With Answers

Here, we have provided case-based/passage-based questions for Class 9 Science Chapter 4 Structure of Atom

Case Study/Passage-Based Questions

Case Study 1: The maximum number of electrons that are permitted to be assigned to an energy shell of an atom is called the electron capacity of that shell. The distribution of electrons in different orbits or shells is governed by a scheme known as the Bohr-Bury scheme. According to this scheme : (i) The maximum number of electrons that can be present in any shell is given by the formula 2n2 where n is the number of energy levels. (ii) The maximum number of electrons that can be accommodated in the outermost shell is 8. Electrons are filled in the shells in a stepwise manner in increasing the order of energy of the energy shell.

What is the maximum electron capacity of the N shell? (a) 24 (b) 8 (c) 18 (d) 32

Answer: (d) 32

Identify the element with the configuration K-2, L-8, M-3. (a) Aluminium (b) Magnesium (c) Sodium (d) Beryllium

Answer: (a) Aluminium

Which of the following configuration represent sodium? (a) 2, 8, 4 (b) 2, 8, 5 (c) 2, 3 (d) 2, 8, 1

Answer: (d) 2, 8, 1

Case Study/Passage Based Questions

The given diagrams show the atomic structures of elements X and Y.

Element X and Y could be _ and _ respectively. (a) Be and B (b) C and O (c) F and N (d) C and N

Answer: (d) C and N

Valency of elements X and Y are respectively, (a) 4 and 3 (b) 2 and 5 (c) 1 and 4 (d) 3 and 4

Answer: (a) 4 and 3

Elements X and Y are (a) isotopes (b) isoelectronic (c) isobars (d) isomers.

Answer: (c) isobars

Case Study 2: The mass of an atom is due to the masses of protons and neutrons in the nucleus. The relative masses of protons and neutrons are almost equal to one. Therefore, the atomic mass of an element should be nearly a whole number. But in many cases the atomic masses are fractional. The main reason for these fractional atomic masses is that these elements occur in nature as a mixture of several isotopes. The atomic mass of an element is the average of the atomic masses of these isotopes in the ratio of their proportion of occurrence.

Chlorine occurs in nature in the form of two isotopes with atomic masses 35 u and 37 u in the ratio of 3 : 1 respectively. The atomic mass of chlorine is (a) 35.5 u (b) 34.5 u (c) 35 u (d) 36 u

Answer: (a) 35.5 u

An element occurs in two isotopic forms with atomic masses 10 and 11. What is the percentage abundance of two isotopes in the sample having an atomic mass of 10.80? (a) 20, 80 (b) 50, 50 (c) 25, 70 (d) 60, 40

Answer: (a) 20, 80

The fractional atomic masses of elements are due to the existence of (a) isotopes having different masses (b) diagonal relationship (c) equal number of electrons and protons (d) none of these.

Answer: (a) isotopes having different masses

Case Study 3: The structure of an atom consists of subatomic particles, mainly protons, neutrons, and electrons. Protons and neutrons are located in the nucleus, which is the central region of an atom. Protons carry a positive charge, while neutrons are electrically neutral. Electrons, on the other hand, are negatively charged particles that orbit around the nucleus in energy levels or shells. The number of protons in an atom determines its atomic number, which is unique to each element. The mass number of an atom is the sum of its protons and neutrons. The atomic mass of an element is the weighted average mass of all its naturally occurring isotopes. Isotopes are atoms of the same element that have different numbers of neutrons. The arrangement and distribution of these subatomic particles determine the overall stability and properties of an atom.

Which subatomic particles are mainly located in the nucleus of an atom? a) Protons and electrons b) Neutrons and electrons c) Protons and neutrons d) Protons, neutrons, and electrons Answer: c) Protons and neutrons

What is the charge of protons? a) Positive b) Negative c) Neutral d) Variable Answer: a) Positive

Where are electrons located in an atom? a) Nucleus b) Energy levels or shells c) Protons d) Neutrons Answer: b) Energy levels or shells

What determines the atomic number of an atom? a) Number of electrons b) Number of protons c) Number of neutrons d) Sum of protons and neutrons Answer: b) Number of protons

What are atoms of the same element with different numbers of neutrons called? a) Isotopes b) Ions c) Elements d) Electrons Answer: a) Isotopes

Hope the information shed above regarding Case Study and Passage Based Questions for Class 9 Science Chapter 4 Structure of Atom with Answers Pdf free download has been useful to an extent. If you have any other queries about CBSE Class 9 Science Structure of Atom Case Study and Passage Based Questions with Answers, feel free to comment below so that we can revert back to us at the earliest possible By Team Study Rate

Class 9 mcq questions for chapter 6 tissues with answers, mcq class 9 social science civics what is democracy why democracy quiz with answers, class 9 mcq questions for chapter 9 force and laws of motion with answers, leave a reply cancel reply.

Save my name, email, and website in this browser for the next time I comment.

Talk to our experts

1800-120-456-456

Matter in Our Surroundings Class 9 Notes CBSE Science Chapter 1 (Free PDF Download)
Revision Notes

CBSE Class 9 Science Chapter 1 - Matter in Our Surroundings Revision Notes - Free PDF Download

Matter can be defined as something that has mass and occupies space. For instance, air, water, oxygen, fruits, etc. All these are considered as matter in our surroundings and are classified as solids, liquids and gases. They are made up of microscopic particles called molecules which are tightly, loosely and very loosely packed, respectively. Being the elementary lesson of Class 9 Science , you must be thorough on the same. In this regard, Matter in Our Surroundings Class 9 Notes by Vedantu can be of immense help. Along with textbooks, make sure to refer to this material for revision purposes and also achieve desired scores in exams. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths Students who are looking for the better solutions, they can download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.

The revision notes of Chapter 1, Class 9 Science subject are present here. The students can simply study these notes before the exam to get a comprehensive overview of teh whole chapter.

We also have provided the free pdf to download which will help the students to revise the chapter anytime, with or without the internet.

Download CBSE Class 9 Science Revision Notes 2023-24 PDF

Also, check CBSE Class 9 Science revision notes for All chapters:

Access Class 9 Science Chapter 1 - Matter in Our Surrounding Notes

Introduction

Everything around us is formed of the matter: a pencil, a pen, a table, the food we consume, the clothes we wear, the walls of our homes. But what is the matter?

Anything that occupies space has mass, and can be sensed by our senses is considered the matter. In other words, the term "matter" refers to all of the substances and materials that make up the cosmos.

Composition of Matter

According to ancient Indian philosophers, the matter is made up of five constituents or tattvas, according to studies found in our sacred books and scriptures.

Illustration 1. How many different ways did ancient Indian philosophers classify matter?

a. $2$

b. $6$

c. $7$

d. $5$

Ans: $\left( D \right)$

Matter is made up of Particles

Now that we have defined matter let us ask ourselves the question – What is a matter made up of?

All matter comprises very small particles.

All matter can be broken up in a similar manner to get very small particles.

Hence we now conclude that all matter is made up of small particles.

(Image will be uploaded soon)

Illustration 2. Which of the following are matters?

Chair, air, love, smell, hate, almonds, thought, cold, cold-drink, the smell of perfume.

Ans: chair, air, almond, cool drink

Properties of Matter

Small particles of matter make up all matter. Some features are shared by all of these particles. A theory called Kinetic Theory of Matter explains forth these features.

Simply said, The Kinetic Theory of Matter States is a theory that describes how matter changes throughout time.

a. All matter is made up of tiny particles.

b. There is space between these particles.

c. The particles are in constant motion.

d. The particles are attracted to one another.

Particles of Matter have space between them

Small particles make up matter, and these particles have small spaces between them.

These areas are not visible to the naked eye, yet particles of other matter can pass through them without changing their volume.

Particles of Matter are continuously moving

Particles in the matter are constantly moving. Three types of motion were seen in the matter particles.

a. Translatory Motion - It occurs when particles move in straight lines and change direction without losing energy after interacting with another particle or the container's wall. When compared to liquids, translational motion is greatest in gases and least in solids.

b. Rotational motion: When particles travel about their own axis, this is known as rotational motion . This motion is comparable to the earth's rotation around its axis. In gases and liquids, the rotational motion will be quite high.

c. Vibrational Motion - When particles move back and forth around a central point. Solids have the greatest amount of motion because the particles are held in a hard framework.

Particles of Matter attract each other

1. The force with which they attract one another differs depending on the matter.

2. The force is modest in some types of materials (waste paper, matchsticks) (as we can tear or break them easily).

3. The force is large in other types of material (iron nail) (as we cannot break the nail easily).

Illustration 3. When sugar dissolves in water, what happens to it? What happens to the sugar? What does the dissolution of sugar in water tell you about the nature of matter?

a. When sugar dissolves in water, the solid sugar crystals are broken up into microscopic particles.

b. The sugar particles interact with the water particles in the gaps between them (to form a sugar solution).

c. Sugar dissolving in water indicates that the stuff (in this case, sugar and water) is made up of minute particles. There are voids between the particles of stuff (in this case, water).

Diffusion

“The mixing and spreading out of a substance with another substance due to the movement or motion of its particles is called diffusion.”

The process of one substance diffusing into another continues until a homogenous mixture is achieved. Let's have a look at an example.

Put a crystal of potassium permanganate (purple colour) in one of the beakers that is full of water. Gradually, you'll notice that the purple-colored crystal begins to diffuse or dissolve into water, and after a while, it turns purple.

Diffusion in Gases

Gases have a very fast diffusion rate. Because gas particles move very swiftly in all directions, this is the case.

Examples \[1:\]

Even from a long distance, the smell of food being prepared in the kitchen reaches us.

The smell of hot, sizzling food reaches us even when we are a long way away, but we must approach close to get the smell of cold food.

This is because the rate of diffusion of hot gases is substantially faster than the rate of diffusion of cold gases released by cold food.

Example \[2:\]

When someone opens a bottle of perfume in one corner of a room, the scent soon travels throughout the space.

When a perfume bottle is opened, the liquid perfume soon turns into vapour (or gas).

The scent vapours flow quickly in all directions in the air, mixing with the air particles and spreading across the room.

Example

The diffusion of a strong-smelling chemical (ethyl mercaptan) found in the cooking gas into the air detects the leaking of cooking gas (LPG) in our houses.

Diffusion in Liquids

Liquid diffusion is slower than gas diffusion. This is due to the fact that particles in liquids move slower than particles in gases.

Solid in Liquid

When a crystal of potassium permanganate is placed in the bottom of a beaker of water, the purple colour of the potassium permanganate progressively spreads throughout the water.

The liquid in Liquid:

When a drop of ink is dropped into a beaker of water, the colour of the ink spreads across the entire water in the beaker; this is due to the diffusion of ink particles into water.

Gases like carbon dioxide and oxygen are necessary for aquatic plants and animals to survive. The carbon dioxide and oxygen gases in the air (or atmosphere) diffuse into and dissolve in water (ponds, lakes, and rivers). Aquatic plants use dissolved carbon dioxide to prepare food through photosynthesis, whereas aquatic animals breathe using dissolved oxygen in the water.

Diffusion in Solids

Solid-state diffusion is an extremely slow process.

Example :

If we write something on a blackboard and then leave it filthy for a long time (say, 10 to 15 days), cleaning the blackboard becomes quite tough. This is owing to the fact that certain chalk particles have dispersed into the backboard's surface.

When two metal blocks are closely linked together and left undisturbed for several years, the particles of one metal permeate into the other metal. Gases dissipate quickly. A gas's rate of diffusion is proportional to the square root of its density.

Force of Attraction (or Cohesion)

Between the particles of matter, there is an attractive force that binds them together. The force of attraction is the attraction between particles of the same substance (or cohesion).

In general, the force of attraction is greatest in solid matter particles and least in gaseous matter particles.

Illustration 4. Analyse the effects of diffusion in different states of matter, such as solid, gas, and liquid.

Ans: $\text{Solid}<\text{Liquid}<\text{Gases}$

Slow Fast Very Fast

States of Matter

Solids have a definite volume and shape. They are more difficult to break than liquids and gases.

Liquids have a specific volume but not a specific shape. They take on the shape of the container they're housed in.

Gases do not have a defined shape or volume. They take up all of the available space and take on the shape of the container in which they are kept.

Plasma - At extremely high temperatures, the plasma state is a fused and ionic condition of matter (like the core of the sun, stars). Because it is made up of positive ions and a pool of electrons, the fused ionic mass is neutral. Around 99 per cent of the universe is made up of fused ionic matter.

Illustration 5.

a. Give two reasons why wood is a solid material.

b. ‘A material has a known volume but no known shape.' Indicate if the substance is solid, liquid, or gaseous.

c. Describe the physical state of matter that can be squeezed readily.

d. ‘A substance has both a definite shape and a defined volume.' Which physical state does this statement represent? A substance has neither a fixed shape nor a fixed volume. State whether it is a solid, a liquid or a gas.

e. Give two reasons to justify that:

i. Water is a liquid at room temp.

ii. An iron almirah is solid.

a. Wood has

i. fixed shape, and

ii. fixed volume

b. Liquid

c. Gas

d. Solid

e. Gas

i. Fixed volume but no fixed shape

ii. Fixed shape and fixed volume.

Rigid and Fluid

Rigid is a word that denotes "unbending" or "inflexible." Because it is unbending or inflexible, a stone is stiff. Fluid is defined as "a material that flows easily" and requires the use of a vessel (container) to keep it contained.

A solid is a kind of stuff that is unyielding. Solids have a tendency to keep their shape when subjected to external force due to their rigidity. As a result, rigidity is the primary distinguishing feature of solids. As a result, rigidity is the primary distinguishing feature of solids. Solids don't need to be kept in a container. Two common solids are a brick and a log of wood.

A liquid is a fluid type of stuff that fills the container's lower half. Liquids must be kept in a container because they are fluids. Because liquids have a well-defined surface, they can be stored in an open container. The liquid will not spontaneously escape from the open container. Water and milk are two prevalent liquids found in our environment.

Gas is a form of stuff that fills the entire container in which it is contained. Gases, like liquids, require a container to keep them contained. Because gas has no open surface, it must be stored in a closed container. If gas is kept in an open container, it will escape. Gases are frequently stored in airtight gas cylinders because of this. Cooking gas (LPG), for example, is stored in airtight metal cylinders. We can conclude from this discussion that fluids include both liquids and gases. Fluidity is a property of liquids and gases that allows them to flow smoothly. When exposed to external stress, liquids and gases change shape quickly due to their fluidity.

Illustration 6. Which of the following is a rigid form of matter

Ans: Ether and alcohol

Interconversion of the state of matter

Changing the temperature, pressure, or both can cause matter to change its physical condition.

a. Melting is the transformation of a solid into a liquid.

b. Solidification is the process of turning a liquid into a solid.

c. The process of converting a liquid to a gas is known as vaporisation.

d. Condensation is the process of turning a gas into a liquid.

e. Sublimation is the process of converting a solid to a gas.

Note: While increasing pressure in gas will not change the physical condition of the gas, it will bring the particles closer together, causing the gas to liquefy.

Vaporization is promoted by lowering pressure over a liquid's surface.

Illustration 7. When solid carbon dioxide is exposed to air, which of the following factors is responsible for the change in state?

a. Increase in pressure

b. Decrease in pressure

c. Increase in temperature

d. Decrease in temperature

Ans: $(a)$ Decrease in pressure; Increase in temperature

Effect of change of Temperature and Pressure

We can change the physical condition of matter in two ways:

a. by changing the temperature; and

b. by changing the pressure

A solid can be changed to a liquid state by raising the temperature, and a liquid may be converted to a gaseous state by lowering the temperature.

Melting (Fusion)

Melting is the transformation of a solid substance into a liquid when it is heated (or fusion).

Melting of the substance refers to the temperature at which a solid melts and transforms into a liquid at atmospheric pressure.

The heat energy in a solid substance causes its particles to vibrate more vigorously. At the melting point, a solid's particles have enough kinetic energy to overcome the strong forces of attraction that keep them in fixed places, and they break apart into small groups. And the solid transforms into a liquid.

The greater the force of attraction between the particles of a solid substance, the higher its melting point. The melting point of iron metal, for example, is extremely high (1535 degrees celsius), indicating that the force of attraction between the particles of iron is extremely strong.

Boiling (Vaporisation)

Boiling is the transformation of a liquid substance into a gas when heated rapidly.

The boiling point of a liquid is the temperature at which it boils and transforms rapidly into a gas at atmospheric pressure.

Condensation

When a gas (or vapour) is cooled sufficiently, the process of turning it into a liquid is termed condensation.

Condensation of steam occurs when steam (or water vapour) cools and converts to water (or condensation of water vapour).

It's the polar opposite of vaporisation. (Boiling)

Freezing

Freezing is the process of turning a liquid (solidification) into a solid by chilling it, the reverse of melting.

When a liquid cools, its particles lose energy, slowing its movement.

If the liquid is sufficiently chilled (to the point of freezing), each particle ceases to move and vibrates in a fixed location. The liquid freezes and solidifies at this point.

As a result of the preceding discussion, we can conclude that changing the temperature can change the state of matter.

Effect of the change in Pressure on the state of matter

Short particles separated by small distances make up matter.

Interparticle distances are exceedingly short in the solid-state.

The inter-particle distances in liquids are slightly greater than in solids.

When compared to liquids or solids, interparticle distances are greatest in the gaseous state.

As a result, it can be shown that when pressure is applied to matter, the effect on solids is insignificant because the particles are so close together.

In liquids, the effect of pressure will be minimal.

Because the interparticle distances are vast, the effect of pressure on gases will be the greatest.

As a result, when pressure is applied to gases, the particles begin to move closer together. The attractive forces between the particles increase as the particles get closer together.

This rise in attracting forces aids the gas's transition of state. When enough pressure is applied, the attraction forces build to the point where the physical state transforms from gaseous to liquid.

The reverse can be expected to happen if the pressure on a gas is decreased.

Illustration 8. Define melting process

Ans: Melting is the transformation of a solid substance into a liquid when it is heated.

Latent Heat

The heat that a substance needs to change its condition without increasing its temperature. It's called latent heat (hidden heat) because it's buried in the substance undergoing a state transition and doesn't show up as a rise in temperature.

“During a transition of state, the latent heat is used up in overcoming the force of attraction between the particles of the substance. It has no effect on the kinetic energy of the substance's particles. And since the substance's temperature does not rise.”

Illustration 9. What is the latent heat of fusion of ice?

Ans: $3.34\times {{10}^{5}}j/kg$

Latent heat of Vaporization and Fusion

There are two types of latent heat:

i. Latent heat of fusion

ii. Latent heat of vaporization

Latent heat of Vaporization

The latent heat of vaporisation is the amount of heat in Joules necessary to turn a unit quantity of 1 kg liquid into vapours without a temperature change.

Experiments have shown that it takes \[22.5\text{ }\times \text{ }{{10}^{5}}\] joules of heat to convert 1 kilogramme of water (at its boiling point, \[\text{100 }\!\!{}^\circ\!\!\text{ C}\]) to steam at the same temperature. As a result, water's latent heat of vaporisation is \[22.5\text{ }\times \text{ }{{10}^{5}}\] joules per kilogramme (or \[22.5\text{ }\times \text{ }{{10}^{5}}\]J/kg).

“If the liquid freezes to create a solid and steam condenses to form water, the substance will emit an equal amount of latent heat of fusion and vaporisation.”

The Latent Heat of Vaporization varies depending on the substance.

Latent heat of Fusion (Solid to Liquid)

It is the amount of heat in Joules required to transform one kilogramme of solid into liquid form without causing a temperature increase.

Experiments have shown that to turn 1 kilogramme of ice into water at the same temperature (\[\text{0 }\!\!{}^\circ\!\!\text{ C}\]), \[3.34\times {{10}^{5}}\] J of heat is required.

So, latent heat of fusion of ice is \[3.34\times {{10}^{5}}\] J/ Kg.

Different substances have different Latent Heat of Fusion.

Illustration 10. Why the temperature of melting ice does not rise even though heat is being supplied continuously.

Ans: Because ice is solid, its particles are attracted to one another by strong forces. These attraction forces keep the particles tightly packed in solid ice. The heat we give ice during melting is completely consumed by overcoming the forces of attraction between ice particles, causing them to loosen up and become liquid water. As a result of this heat not increasing the kinetic energy of particles, no temperature rise occurs during the melting of ice. However, once all of the ice has melted to create water, additional heating increases the kinetic energy of water particles, causing the temperature of the water to rapidly rise.

Sublimation

Sublimation is defined as the transformation of a solid into vapours on heating and back to a solid on cooling.

$\text{Solid}\rightleftarrows \text{Vapour (or Gas)}$

Ammonium chloride, iodine, camphor, naphthalene, and anthracene are some of the common substances that sublimate.

Solid carbon dioxide is yet another example of sublimation (which is commonly known as dry ice).

Carbon dioxide gas is formed when solid carbon dioxide (or dry ice) sublimates.

Illustration 11.

a. When heated, which of the following substances sublimates:

iv. Camphor

v. Sodium Chloride

b. What happens to the heat energy that has been delivered once a solid has melted?

c. A substance's melting point is lower than room temperature. Predict the state of its physical state.

d. Is it permissible to refer to ammonia in its gaseous state as vapours?

e. What is the name of the chemical reaction that converts a solid into a gas?

f. During a substance's change of state, which of the following energy is absorbed?

i. Specific Heat

ii. Latent heat

iii. Heat of solution

g. Identify one common chemical that can change state when heated or cooled.

a. Camphor and iodine

b. It is converted into latent heat of fusion

c. It is a liquid.

d. No, it is not

e. It is called sublimation

e. Latent heat

Evaporation

The phenomenon of evaporation occurs when a liquid transforms to a gaseous state below its boiling point.

Water molecules are attracted to other water molecules in all directions, but the water molecules near the surface of the water are only dragged inward, which is below the water's surface.

Note: Evaporation is a phenomenon that occurs in all liquids in theory. But, in general, when we talk about evaporation, we're talking about water evaporation.

Vapour is a substance that can remain in a gaseous state at a temperature where it would ordinarily be a solid or liquid.

Examples of solids that can exist as a vapour: camphor, naphthalene

Factors Affecting Evaporation

Evaporation depends on temperature, surface area and weather conditions

a. As the quantity of water molecules at the surface grows, evaporation increases if the surface area of the water is big. As a result, more water molecules are likely to break out once they have enough kinetic energy.

b. As the temperature approaches the boiling point of water, evaporation increases. The kinetic energy of the molecules increases as the temperature rises. The extra kinetic energy required by surface molecules to break loose or evaporate is reduced as a result. As a result, evaporation increases.

c. Evaporation decreases in excessively humid weather because the air is saturated with water molecules.

d. As water evaporates, the air just above the water surface becomes saturated with water molecules.

Illustration 12. What effect does temperature and surface area have on evaporation?

Ans: Evaporation increases as the temperature and surface area increase.

Cooling Effect

How Does Evaporation Cause Cooling?

When a liquid evaporates, the energy is extracted from the liquid. As a result, it continues to cool. The liquid absorbs the energy lost by the surroundings, causing them to cool. During the summer, for example, air coolers are used to provide forced cooling.

Illustration 13. Make a note of the cooling mechanism.

Ans: As a gas particle's energy drops due to cooling, the particle's moment slows down. The particles also become significantly closer to one another, resulting in the intermolecular attraction force. The gas contracts as a result of this.

Matter in our Surroundings Notes Free PDF Download

Class 9 Science Notes Chapter 1 PDF material is entirely free and can be easily availed from Vedantu’s website or application. So download the same and make it a revision guide for both unit test and final examinations. By downloading the Chapter 1 Science Class 9 Notes, you no longer need to prepare a list of essential topics and explanations by yourself. Besides the usage of simple and lucid language, this material is also drafted as per the latest CBSE curriculum, which makes it a perfect revision guide.

Class 9 Chapter 1 Science Notes – Summary

The notes of Ch 1 Science Class 9 begins with the introduction about the matter in our surroundings, its composition, what are they made up of, etc. Although you have learnt this in your previous classes, you must study it again to have a proper grasp over this concept. The next part of Class 9 Science Chapter 1 Notes explain the properties of matter. As you all know that matter is made up of tiny particles, and have unique characteristics. Additionally, these characteristics of matter are provided by a theory termed as Kinetic Theory of Matter which states the following:

Particles of matter have space between them.

Particles of matter are continuously moving – rotational and vibrational motion.

Particles of matter attract each other.

In the next section of Science Class 9 Chapter 1 Notes, students will get to know about diffusion; especially the provided diagram makes it easy to comprehend. You will also learn that diffusion occurs at a fast rate in gases. The reason for this is elaborated with suitable examples in the PDF material of Matter in our Surroundings Class 9 Notes. Besides, diffusion in liquids and solids are also discussed precisely that will help you to understand this concept clearly.

Information about the three states of matter – solid, liquid and gas are correctly laid out in this Class 9 Matter in our Surroundings Notes PDF alongside their various properties. Plus a tabular representation of differences between solid, liquid and gases is also given.

Inter Conversion of the States of Matter

With a change in pressure and temperature, matter can change from one form to another form. This section of Class 9 Science Ch 1 Notes deal regarding the same. You will get to know about all the various changes of states like melting, solidification, vaporisation, condensation, sublimation, etc in the Matter in our Surroundings Class 9 Notes.

Latent Heat and Latent Heat of Vaporisation and Fusion

This section of Class 9 th Science Chapter 1 Notes discuss latent heat and different types of the same – latent heat of fusion and latent heat of vaporisation. The different values of latent heat are also given which you can learn in the Matter in our Surroundings Class 9 Notes to write accurate answers.

Sublimation, Evaporation and Cooling Effect

In the last section of Science Chapter 1 Class 9 Notes, you will get an insight about sublimation, evaporation and cooling effect. All these state change processes are supported with appropriate examples.

Make sure to download notes of Science Class 9 Chapter 1 PDF file today from Vedantu’s official website or the app. Along with topic wise explanation, few questions and solutions are also provided in Class 9 Ch 1 Science Notes that will assist you during quick recapitulation before the exams.

Conclusion

In conclusion, the Matter in Our Surroundings Class 9 Notes CBSE Science Chapter 1 provides a comprehensive understanding of the fundamental concepts related to matter. This chapter introduces students to the basic properties of matter, including its physical nature, states, and characteristics. The notes offer a concise and organised overview of the chapter, aiding students in grasping the key concepts effectively.

By studying these notes, students can gain knowledge about the different states of matter, such as solids, liquids, and gases, and the changes they undergo under various conditions. They also learn about the concept of the particle nature of matter and the behaviour of particles at the microscopic level.

FAQs on Matter in Our Surroundings Class 9 Notes CBSE Science Chapter 1 (Free PDF Download)

1. Is matter in our surroundings pure Class 9 notes?

Not all matter surrounding us exists in its pure form. The chapter discusses the difference between a substance and a mixture. A substance is present in its pure form, whereas, a mixture is a combination of two or more pure substances that can be separated into other types of matter through physical processes. For instance, seawater is a mixture of water and salt. Salt can be separated from it by the process of evaporation.

2. What are the basics of Class 9 Science, Chapter 1 - ‘Matter in Our Surroundings?’

Class 9 Science, Chapter 1 - "Matter in Our Surroundings," covers the fundamentals of Physical Chemistry. It starts with an introduction to matter and the three states of matter: solids, liquids, and gases. The chapter then dives into the process through which matter may change states. Some key ideas taught include the boiling and melting points. As the chapter progresses, the distinction between the latent heat of fusion and the latent heat of vapourization becomes obvious. The chapter concludes with a discussion of evaporation and the elements that influence it.

3. Will Revision Notes help ace Class 9 Science, Chapter 1 - ‘Matter in Our Surroundings?’

Yes, Revision Notes of Class 9 Chapter 1 are the ultimate and end saviour for before the exams. The students are required to go through other study material as well.

The first step is to properly read NCERT Class 9 Science, Chapter 1 - "Matter in Our Surroundings." Study the chapter attentively and attempt to grasp the fundamental principles. Clarify your doubts and reason through everything you encounter in the chapter to ensure a thorough comprehension of all the principles. Finally, using Vedantu's Revision notes, answer the back exercise questions. All issues should be reviewed on a regular basis. Answer a large number of previous year problems to learn this chapter and do well on the Science exam.

4. What are the best Revision Notes for Class 9 Science, Chapter 1 - ‘Matter in Our Surroundings?’

The best Revision Notes for Class 9 Science, Chapter 1 - ‘Matter in Our Surroundings,' can be accessed by visiting the page CBSE Class 9 Science Revision Notes Chapter 1 on the Vedantu website. Vedantu's Revision Notes are the most credible and productive study material from an examination viewpoint. If you study from these notes, you don't have to look for other study materials. These notes have zero errors and have been prepared by the best faculty of Chemistry teachers in India. All the important topics of this chapter are covered in simple language. These PDFs are available at free of cost on the Vedantu website and the Vedantu app.

5. Can I use these revision notes even in offline mode?

Yes, by pre-downloading the pdf of revision notes the students can easily study the notes late on even when they are offline.

STUDY MATERIALS FOR CLASS 9

COMMENTS

Case Study Questions Class 9 Science Matter in our Surroundings
At Case Study Questions there will given a Paragraph. In where some Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks or 4 marks. CBSE Case Study Questions Class 9 Science - Matter in our Surroundings Case Study 1: 1.) A matter is anything that has mass and occupies ...
Class 9 Science Case Study Questions PDF Download
This article aims to present a comprehensive collection of case study questions for Class 9 Science, covering various topics and concepts. Join our Telegram Channel, there you will get various e-books for CBSE 2024 Boards exams for Class 9th, 10th, 11th, and 12th. CBSE Class 9 Science Exam will have a set of questions based on case studies in ...
Class 9 Science Case Study Questions Chapter 3 Atoms and Molecules
Here, we have provided case-based/passage-based questions for Class 9 Science Chapter 3 Atoms and Molecules. Case Study/Passage-Based Questions. Case Study 1: The knowledge of the valencies of various radicals helps us to write the formulae of chemical compounds. The total positive charge on positive ions (cations) is equal to the total ...
Class 9 Science Case Study Questions
Class 9 case study questions are meant to evaluate students' knowledge and comprehension of the material. ... Physics, Chemistry and Biology. Each section contains a number of topics that Class 9 science students must study during the course. CBSE Class 9 Science (Code No. 086) Unit No. unit: Marks: I: Matter- Its Nature and Behaviour: 25: II ...
Class 9 Science Case Study Questions Chapter 1 Matter in our
b) Dissolution, combustion, sublimation, and oxidation. c) Fermentation, photosynthesis, respiration, and digestion. d) Oxidation, reduction, precipitation, and ionization. Answer: a) Evaporation, condensation, melting, and freezing. Hope the information shed above regarding Case Study and Passage Based Questions for Class 9 Science Chapter 1 ...
CBSE Class 9 Science Important Case Study Questions with Answers for
CBSE Class 9 Science Sample Paper with Solutions for Term 2 Exam 2022. Check some of the important case study questions below: Q. Read the following and answer the questions: A student was asked ...
Class 9 Chemistry (India)
Class 9 Chemistry (India) 4 units · 15 skills. Unit 1. Is Matter Around Us Pure? Unit 2. Matter in Our Surroundings. Unit 3. Atoms and Molecules. Unit 4. Structure of the Atom. Course challenge. Test your knowledge of the skills in this course. Start Course challenge. Science; Class 9 Chemistry (India) 1,500 possible mastery points. Mastered.
NCERT Solutions for Class 9 Science Chapter 1 Matter in ...
Class 9 Science NCERT Solutions Chapter 1 Matter in Our Surroundings. CBSE Class 9 Science NCERT Solutions Chapter 1 helps students to clear their doubts and to score good marks in the board exam. All the questions are solved by experts with a detailed explanation that will help students complete their assignments & homework.
Case Study Questions of Chapter 3 Atoms and Molecules PDF Download
The formula of the sulphate of an element X is X2(SO4)3. The formula of nitride of element X will be. The formula of a compound is X3Y. The valencies of elements X and Y will be respectively. Case Study/Passage Based Questions. A mole of an atom is a collection of atoms whose total mass is the number of grams equal to the atomic mass.
Case Study and Passage Based Questions for Class 9 Science Chapter 2 Is
Last modified on:2 years agoReading Time:5MinutesCase Study Questions for Class 9 Science Chapter 3 Atoms and Molecules In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and ...
Case Study Questions for Class 9 Science Chapter 1 Matter in Our
Case Study Questions for Class 9 Science Chapter 1 Matter in Our Surroundings. Here we are providing case study questions for class 9 science chapter 12 sound. Students are suggested to go through each and every case study questions for better understanding of the chapter. ... 10 Years CBSE Class 12 Chemistry Previous Year-Wise Solved Papers ...
Matter in Our Surroundings
Class 9 Chemistry (India) 4 units · 15 skills. Unit 1. Is Matter Around Us Pure? Unit 2. Matter in Our Surroundings. Unit 3. Atoms and Molecules. Unit 4. Structure of the Atom. Course challenge. Test your knowledge of the skills in this course. Start Course challenge. Science; Class 9 Chemistry (India)
Class 9th Science
A Chemistry teacher explained the different types of separation of mixtures with the help of given adjoined chart. Now, in a practical test, students were provided with give samples and they were asked to separate the samples applying suitable separation methods. ... Class 9th Science - Motion Case Study Questions and Answers 2022 - 2023 ...
Class 9 Science Case Study Questions Chapter 2 Is Matter ...
Case Study/Passage-Based Questions. Case Study 1: Akshita wants to separate the mixture of dyes constituting a sample of ink. She marked a line by the ink on the filter paper and placed the filter paper in a glass containing water as shown in the figure. The filter paper was removed when the water moved near the top of the filter paper.
Case Study Questions -1
Case Study Questions -1 | CBSE Class 9 Chemistry | Surabhi Ma'am | Elementary Chemistry by Vedantu. In this online class Surabhi ma'am will explain how to so...
Case Study Questions of Class 9 Science PDF Download
by experts. Download PDF Case Study Questions of Class 9 Science to prepare for the upcoming CBSE Class 9 Exams Exam 2023-24. With the help of our well-trained and experienced faculty, we provide solved examples and detailed explanations for the recently added Class 9 Science case study questions. Case study questions are based on real or ...
Class 9 Chemistry Chapter 1
By practicing these Class 9 important questions, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 9 Annual examinations. Download Class 9 Chemistry Chapter 1 - Matter in Our Surroundings Important Questions with Answers PDF by clicking on the button below.
CBSE Class 9 Case Study Questions
Maths Case-Study Qs. Maths Case-Study Qs. VIEW ALL. TopperLearning offers an online platform to access case studies for CBSE Class 9 students. Explore your analytical and problem-solving skills by solving case studies with our expert guidance. Get started today!
PDF Class Ix Chemistry Chapter 1 Matter in Our Surroundings Case Study
CLASS IX CHEMISTRY CHAPTER 1 - MATTER IN OUR SURROUNDINGS CASE STUDY QUESTIONS 1. In an experimental activity, crushed ice was taken in a beaker. A thermometer is fitted in such a way that its bulb was thoroughly surrounded by ice. The beaker is now slowly heated and temperature was regularly noted.
case study questions class 9 chemistry cbse science
In this video i solved a case based questions chemistry of class 9 science 2021 22 term 1download the sample paper from the following linkhttps://drive.googl...
Class 9 Science Case Study Questions Chapter 4 Structure of Atom
Case Study/Passage Based Questions. The given diagrams show the atomic structures of elements X and Y. Element X and Y could be _ and _ respectively. (a) Be and B (b) C and O. (c) F and N (d) C and N. Show Answer. Valency of elements X and Y are respectively, (a) 4 and 3 (b) 2 and 5. (c) 1 and 4 (d) 3 and 4.
Matter in Our Surroundings Class 9 Notes CBSE Science Chapter ...
CBSE Class 9 Science Chapter 1 - Matter in Our Surroundings Revision Notes - Free PDF Download. Matter can be defined as something that has mass and occupies space. For instance, air, water, oxygen, fruits, etc. All these are considered as matter in our surroundings and are classified as solids, liquids and gases.
PDF Case Study Questions Class Ix Science Chapter 2 Is Matter Around Us Pure
CASE STUDY QUESTIONS CLASS IX SCIENCE CHAPTER 2 - IS MATTER AROUND US PURE 1. A solution which can dissolve more of the solute at a given temperature is called unsaturated solution. However, a solution which cannot dissolve any more of the solute is called saturated solution. The amount of solute that can

Case Study Questions Class 9 Science Matter in our Surroundings

CBSE Case Study Questions Class 9 Science – Matter in our Surroundings

Case Study 2:

Case Study 3:

Case Study 4:

Case Study 5:

Leave a Reply Cancel reply

We have a strong team of experienced Teachers who are here to solve all your exam preparation doubts

Class 9 Science Case Study Questions

myCBSEguide App

The rationale behind Science

Case study questions in Class 9 Science

Examples of Class 9 science class case study questions

Class 9 science case study question 1

Class 9 science case study question 2

Class 9 science case study question 3

Cracking Class 9 Science Case Study Questions

A look at the Class 9 Science Syllabus

myCBSEguide: A true helper

Related Posts

Leave a Comment

SRM University

CBSE Class 9 Science Important Case Study Questions with Answers for Term 2 Exam 2022 (PDF)

Latest Education News

NCERT Solutions for Class 9 Science Chapter 1 Matter in Our Surroundings

Class 9 Science Chapter 1 Textbook Questions and Answers

Class 9 Science NCERT Solutions Chapter 1 Matter in Our Surroundings

NCERT Solutions for Class 9 Science Chapter 1 PDF

Leave a Reply Cancel reply

Case Study Questions for Class 9 Science Chapter 1 Matter in Our Surroundings

Related Posts

Leave a Reply Cancel reply

Discover more from Gurukul of Excellence

Unit 2: Matter in Our Surroundings

States of matter

Class 9th Science - Is Matter Around Us Pure Case Study Questions and Answers 2022 - 2023

QB365 - Question Bank Software

*****************************************

Related 9th Standard CBSE Science Materials

Class VI to XII

9th Standard CBSE Study Materials

9th Standard CBSE Subjects

Case Study Questions of Class 9 Science PDF Download

Class 9 Science: Case Study Questions

Chapterwise Case Study Questions of Class 9 Science

Class 9 Science Syllabus

Unit I: Matter-Nature and Behaviour

Unit II: Organization in the Living World

Unit III: Motio n, Force, and Work

Unit IV: Food Production

Books for Class 9 Science Exams

Benefits of Case Study Questions

1. What is the purpose of case study questions in Class 9 Science?

2. How can case study questions help improve analytical skills?

3. Are case study questions difficult to answer?

Leave a Comment Cancel reply

Download India's best Exam Preparation App Now.

Class 9 Chemistry Chapter 1 - Matter in Our Surroundings Important Questions with Answers

Download Class 9 Chemistry Chapter 1 – Matter in Our Surroundings Important Questions with Answers PDF by clicking on the button below.

Class 9 Chapter1 – Matter in Our Surroundings Important Questions with Answers

Long Answer Type Questions

Recommended Videos

Can Matter Change its State?

Leave a Comment Cancel reply

Register with BYJU'S & Download Free PDFs

Class 9 Science Case Study Questions Chapter 4 Structure of Atom

Structure of Atom Case Study Questions With Answers

You Might Also Like

CBSE Class 9 Science Chapter 1 - Matter in Our Surroundings Revision Notes - Free PDF Download

Download CBSE Class 9 Science Revision Notes 2023-24 PDF

Access Class 9 Science Chapter 1 - Matter in Our Surrounding Notes

States of Matter

Matter in our Surroundings Notes Free PDF Download

Class 9 Chapter 1 Science Notes – Summary

Inter Conversion of the States of Matter

Latent Heat and Latent Heat of Vaporisation and Fusion

Sublimation, Evaporation and Cooling Effect

Conclusion

FAQs on Matter in Our Surroundings Class 9 Notes CBSE Science Chapter 1 (Free PDF Download)

STUDY MATERIALS FOR CLASS 9