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which occurs when a substance x is converted from liquid to vapour phase at the standard boiling point?
I. Potential energy of the system decreases
II. The distance between molecules increases
III. The average kinetic energy of the molecules in both phases are equal

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I only
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c
III only
d
II and III only

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detailed solution

Correct option is D

Due to phase transfer distance between particle changes, because temperature remains constant, so KE remains constant.

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