Question

Answer them fast and correctly

1.  CO2 can be easily liquified and even solidified because

(a)   It has weak forces of attraction

(b)   It has comparatively more force of attraction than other gases

(c)   It has more intermolecular space

(d)   It is present in atmosphere.


2.  Which of the following has heighest kinetic energy?

(a)   Particles of ice at 0 °C

(b)   Particles of water at 0 °C

(c)   Particles of water at 100 °C

(d) Particles of steam at 100 °C


3.  Bose-Einstein Condensate have

(a)   Very low kinetic energy

(b)   Low kinetic energy

(c)   High kinetic energy

(d)   Highest kinetic energy.

4.  Which of the following is most suitable for summer?

     (a)   Cotton

     (b)   Nylon

     (c)   Polyester

     (d)   Silk.


5.  Which of the following is incorrect about plasma?

(a)   Fluorescent tube and neon sign bulbs consist of plasma.

(b)   The gas gets ionised when electrical energy flows through it.

(c)   It consists of super-energetic and super-excited particles.

(d)   The plasma glows with colour which does not depend upon nature of gas.

6.  The colour of vapours formed on sublimation of iodine solid is

(a)   Purple (violet)

(b)   Colourless

(c)   Yellow

(d)   Orange


7.  Under which of the following conditions we can boil water at room temperature?

(a)   At low pressure

(b)   At high pressure

(c)   At very high pressure

(d)   At atmospheric pressure


8.  Which of the following is not endothermic process?

(a)   Fusion

(b)   Vapourisation

(c)   Temperature

(d)   Insoluble heavy impurities


9.  Which of the following does not affect rate of evaporation?

(a)   Wind speed

(b)   Surface area

(c)   Temperature

(d)   Insoluble heavy impurities


10.  Kinetic energy of molecules is directly proportional to

(a)   Temperature

(b)   Pressure

(c)   Both (a) and (b)

(d)   Atmospheric pressure


11. On heating, a solid is converted to liquid. This change is called ………………..

(a) Melting

(b) Fusion

(c) Diffusion

(d) Freezing



12. The conversion of a liquid into vapour by heating is …………….

(a) Melting

(b) Condensation

(c) Freezing

(d) Evaporation



13. Gases have neither definite shape not definite ……………

(a) Mass

(b) Volume

(c) Weight

(d) Rigidity



14. The substances that does not have definite shape but definite mass is …………..

(a) Solid

(b) Matter

(c) Liquid

(d) Gas

15. Due to increase in temperature, the particles vibrate with greater ……………….

(a) speed

(b) distance

(c) movement

(d) time



16. Which state has maximum intermolecular force?

(a) solid

(b) liquid

(c) gas

(d) plasma



17. In gaseous state, molecules can move ……………..

(a) only in one direction

(b) only in fixed path

(c) randomly in all directions

(d) upward and downward only



18. The gases are highly compressible because …………….

(a) the molecules move randomly

(b) the molecular force of attraction is very weak

(c) The separation between molecules is very large

(d) The separating force is strong



19. The state of matter can be changed by varying ……………….

(a) pressure

(b) volume

(c) mass

(d) temperature

20.  The latent heat of vaporization of water is …………………….
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Answer 1

Answer:

q 1 b

B

Explanation:

b is the correct answer