CBSE Class 9 Chemistry Matter In Our Surrounding Worksheet Set B

Read and download free pdf of CBSE Class 9 Chemistry Matter In Our Surrounding Worksheet Set B. Students and teachers of Class 9 Chemistry can get free printable Worksheets for Class 9 Chemistry in PDF format prepared as per the latest syllabus and examination pattern in your schools. Standard 9 students should practice questions and answers given here for Chemistry in Grade 9 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 9 Chemistry Worksheets prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this academic year and solve important problems provided here with solutions on daily basis to get more score in school exams and tests

Matter In Our Surrounding Class 9 Chemistry Worksheet Pdf

Class 9 Chemistry students should refer to the following printable worksheet in Pdf for Matter In Our Surrounding in standard 9. This test paper with questions and answers for Grade 9 Chemistry will be very useful for exams and help you to score good marks

Class 9 Chemistry Worksheet for Matter In Our Surrounding

 

CBSE Class 9 Chemistry Worksheet - Matter In Our Surrounding  - Practice worksheets for CBSE students. Prepared by teachers of the best CBSE schools in India.

 

CBSE Class 9 Chemistry Worksheet - Matter In Our Surrounding 

1. What is matter? What are the physical states of matter?

2. With the help of an activity, show particulate nature of matter.

3. What are characteristics of particles of matter?

4. What is diffusion? Give an example.

5. Write any five characteristics of solids, liquids and gases.

6. Why can we smell hot food from a distance?

7. Why does a solid change into liquid on heating?

8. Define latent heat of fusion.

9. Give reason – A gas fills completely the vessel in which it is kept.

10. Why a wooden table should be called solid?

11. Why more serious burns are caused by steam at 1000c than water at same temperature?

12. Why can a sponge be compressed though it is a solid?

13. Carry out following conversion (a) 500c to Kelvin (b) 200 k to Celsius.

14. Name the conditions to liquefy a gas.

15. Why are clothes spread out for drying?

16. What kind of clothes is most suitable for summers? Why?

17. What is sublimation? Explain with help of an activity and a diagram.

18. Washed clothes dry up more quickly on a hot summer day than on a rainy day. Why?

19. What is the difference between evaporation and boiling?

20. Define latent heat of vaporization.

21. Wearing synthetic clothes in summers is usually avoided. Why?

22. How does water get cooled in an earthen pot?

23. What is dry ice?

24. Name the factors affecting evaporation.

25. How does evaporation cause cooling? Explain with example.

26. How can physical state of matter be changed?
 

 Exam Questions NCERT Class 9 Science Chapter 1 Matter in Our Surroundings
 

Question. Express the boiling point of water in Celsius as well as Kelvin scale.
Ans : 100°C and 373 K.

Question. What do you mean by latent heat of vaporization?
Ans : The latent heat of vaporization of a liquid is the quantity of heat in joules required to convert 1 kilogram of the liquid to vapour or gas at its boiling point, without any change in temperature.

Question. What property of gas is used when natural gas is supplied for vehicles?
Ans : A gas is highly compressible and a large quantity of it can be compressed to a small, manageable volume. Thus, natural gas is compressed and is supplied for use by vehicles in the name of CNG (compressed natural gas).

Question. How is pressure developed in a container full of a gas?
Ans : The gaseous particles are free to move in the container. These move at high speed and collide with other particles of the container. The bombardment of the particles on the walls of the container produces a steady force that depends on the temperature. This force per unit area is called as pressure of the gas.

Question. Why evaporation is called surface phenomenon?
Ans : Evaporation is called surface phenomenon as evaporation occur on the surface of liquid.

Question Name two processes from which it may be concluded that the particles of a gas move continuously.
Ans : Compressibility and Brownian movement.

Question Is it not proper to regard the gaseous state of ammonia as vapours? Explain.
Ans :The gaseous state of a substance can be regarded as vapours only in case it is a liquid at room temperature.
Since ammonia is a gas at room temperature, its gaseous state cannot be regarded as vapours. Naphthalene is volatile solid and has a tendency to sublime. So, it changes into vapours completely, thus disappear into the air and no solid is left.

Question. State characteristics of matter demonstrated by :
(i) Diffusion.
(ii) Brownian motion.
Ans : (i) Diffusion involves movement of different particles so that they become intermixed uniformly.
(ii) Brownian motion : It is the zig-zag movement of the small particles suspended in a liquid or a gas.

Students must free download and practice these worksheets to gain more marks in exams. CBSE Class 9 Chemistry Worksheet - Matter In Our Surrounding 

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