Wednesday, May 9, 2018

CBSE Class 9 Chemistry - Matter in our surroundings - Unit Test Paper (#cbsenotes)(#eduvictors)

Matter In Our Surroundings

(Unit Test Paper)



CBSE Class 9 Chemistry - Matter in our surroundings - Unit Test Paper (#cbsenotes)(#eduvictors)

Matter in our surroundings 
Unit Test Paper

1. What is the physical nature of  matter? 

2. What are the characteristics of particles of matter? 

3. Why do the particles  mix faster in gases than in solids or liquids? 

4. Why can you smell an incense stick in the whole room even if it is lit at one place? 

5. Comment on the properties of matter in tabulated form keeping in mind the rigidity,  compressibility, kinetic energy,  fluidity and density.


6. What is the full form of LPG and CNG? 

7. When a solid melts,  it's temperature remains the same, so where does the heat energy go?

8. Define  melting  point and boiling point of water.  

9. Convert 373 K,  573K into Celsius scale. 

10. Define  latent heat of vaporization. 

11. Define  sublimation.  Name two sublime substances. 

12. What happens when we start  putting pressure and compress a gas enclosed in a cylinder? 

13. What is dry Ice? 

14. Suggest a method to liquefied atmospheric gases. 

15. What are the differences between boiling and  evaporation?

16. What are the factors affecting evaporation? 

17. How does evaporation cause Cooling? 

18. Why should we wear cotton clothes in summers? 

19. Why do we see water droplets on the outer surface of a glass containing ice - cold water? 

20. Why do people sprinkle water on the roof, on a hot summer day? 

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