Q.

Which of the following is valid at absolute zero

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a

K.E. of the gas becomes zero but the molecular motion does not become zero

b

K.E. of the gas becomes zero and the molecular motion also becomes zero

c

K.E. of the gas decreases but does not become zero

d

None of these

answer is B.

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Detailed Solution

At absolute zero temperature (0°K ) the kinetic energy K.E of gas become zero. But the potential energy P.E to be maximum at this temperature

At the absolute temperature, inter molecular attraction forces among the molecules are strong. However, the molecular motions become zero

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