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Question

The absolute zero is the temperature at which :


A

water freezes.

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B

all substances exist in solid state.

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C

molecular motion ceases.

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D

ice melts.

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Solution

The correct option is C

molecular motion ceases.


At absolute zero (i.e. 0 K) vrms becomes zero. Absolute zero is the lowest possible temperature where no heat energy remains in a particle and the particle does not has enough energy to move therefore its motion ceases at molecular level.


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