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If a gas expands at constant temperature...

If a gas expands at constant temperature

A

the pressure increases

B

the K.E. of the molecules remains the same

C

the K.E. of the molecules decreases

D

the number of molecules of gas decreases

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The correct Answer is:
B, C
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  17. Liquds which are more volatile have forces of attraction.

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  18. Which of the following value of R is not correct ?

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  19. SI unit of pressure is

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  20. Hydrogen bonding is a particularly strong type of …… interaction

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