Class 9 Matter In Our Surroundings Quiz Set 1

1. Liquid diffuse slowly compared to gases because

 
 
 
 

2. The smell of perfume spread out by a process known as

 
 
 
 

3. Rate of diffusion depends upon:

 
 
 
 

4. Which is more effective in cooling?

 
 
 
 

5. Gases can be liquefied by

 
 
 
 

6. choose the correct statements from  the folowing:

 
 
 
 

7. Which of the following has the strongest interparticle forces at room temperature?

 
 
 
 

8. on converting 25°C, 38°C and 66°C to kelvin scale, the correct sequence of temperature will be

 
 
 
 

9. Which of the following statement do not express the properties of the solid?

1).The particles of a solid have high energy.

2).The interparticle forces of attraction in a solid are very weak.

3).A solid melts at a fixed temperature.

4).The fluidity of a solid is very high.

 
 
 
 

10. Under which of the following condition, the distance between the molecules of the hydrogen gas would increase ?

1). increasing pressure on hydrogen contained in a close container

2). some hydrogen gas leaking out of the container

3).increasing the volume of the container of hydrogen gas.

4).adding more hydrogen gas to the container without increasing the volume of the container.

 
 
 
 

11. During summer, water kept in a earthen pot becomes cool because of the phenomenon of

 
 
 
 

12. which one of the following sets of the phenomena would increase on raising the temperature ?

 

 
 
 
 

13. When we put some crystals of potassium permanganate in a beaker containing water, we observe that after sometime whole water has turned pink. This is due to:

 
 
 
 

14. Seema visited a natural gas compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. while sharing her experience with friends, she got confused. Help her to identify the correct srt of conditions.

 
 
 
 

15. The boiling point of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C  and 118°C respectively . Which one of the following correctly represents their boiling  points in kelvin scale ?

 
 
 
 

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