Matter In Our Surroundings- Class IX


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Matter In Our Surroundings- Class IX - Vasu Classes

1. What is not true about matter?

a) Matter is made up of small particles
b) Matter has some mass
c) Matter occupies space
d) Matter is made up of five basic elements
e) Matter can be classified only on the basis of physical properties

2. When you dissolve sugar in water , sugar disappears as

a) Its particles occupy space between water molecules
b) it is soluble in water
c) its particles are colourless when dissolve

3. In which state of matter volume is fixed but shape is not fixed

a) Liquid
b) Gas
c) Solid

4. Which of the following are rigid?

a) Sugar
b) Acetone
c) Chalk
d) A and C
e) B and C

5. Inter mixing of the particles of two substances is called

a) Brownian motion
b) Diffusion
c) Solubility
d) Fluidity

6. Liquids are more compressible than solids as

a) they do not have fixed shape
b) weak force of attraction between particles and have more space
c) they can flow

7. In which form of the matter the particles have maximum KE.

a) Solid
b) Liquid
c) Gas

8. Arrange salt , water and carbondioxide in the increasing order of intermolecular force of attraction

a) Water , CO2 , Salt
b) Salt , CO2 ,water
c) CO2 , Water , Salt

9. Diffusion tells us that

a) Particles are very small
b) Particles have spaces between them
c) Particles ar constantly moving
d) All of the above
e) A and C

10. When we decrease the pressure the boiling point of a liquid

a) does not change
b) decreases
c) increases

11. What is the physical state of water at 373K?

a) Gas
b) Liquid
c) Solid

12. In which of the following energy is absorbed?

a) Condensation
b) Fusion
c) Vapourisation
d) A and C
e) B and C

13. What is the value of normal atmospheric pressure?

a) 2 Pascal
b) 1 N/m2
c) 1 kg/cm2
d) B and C
e) None

14. Which of the following are sublimes? Iodine , Camphor , Chalk , Ammonium chloride , Perfume

a) Camphor , perfume , chalk
b) Ammonium chloride , chalk , Iodine
c) Ammonium Chloride , camphor , iodine
d) Chalk , Perfume

15. The MP of three liquids A ,B and C are 280K , 320K and 360K. The increasing order of interamolecular force between them will be

a) A ,B,C
b) C ,B ,A
c) A ,C,B

16. Which factors affect the rate of evaporation?

a) Temperature
b) Surface area
c) Wind speed
d) B and C
e) A ,B ,C

17. The heat supplied which helps to overcome the force of attraction between the particles is called

a) Latent heat
b) Sensible heat
c) Specific heat

18. Which of the following heats is released in addition by 100 degree steam than 100 degree water

a) Specific heat
b) Sensible heat
c) Internal energy
d) latent heat

19. Water kept in earthen pots becomes cool due the process of

a) Freezing
b) As it behaves like refrigerator
c) Evaporation due to seeping of water
d) Soil of pot absob heat of water

20. Gases can be liquified

a) By increasing pressure
b) By increasing temperature
c) By increasing pressure and decreasing temperature
d) None

21. Smell of cooked food reaches to us due the process of

a) Evaporation
b) Fusion
c) Diffusion
d) Boiling

22. What happens when you pour some acetone on your palm?

a) Burning sensation
b) Cooling of palm
c) Nothing happens
d) Severe pain in your palm

23.

Sponge has small pores filled with air when we squeeze it the air is expelled out

The shape of sponge can be changed then it must be a

a) Solid
b) Gas
c) Liquid
d) None of the above

24. Which of the following is surface phenomenon

a) Evaporation
b) Boiling
c) Both a and b
d) None

25. When a gas is compressed keeping the temperature constant , it results in

a) decrease in the speed of molecules
b) increase in collision among the gaseous molecules
c) decrease in the speed of gaseous molecules
d) decrease in collision among gaseous molecules

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