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Question

On heating a closed vessel containing liquid and vapour in equilibrium, which statement is correct?

This question was previously asked in
HTET 2025 Level 1 PRT Question Paper (5-Jul-2026)
The correct answer is

Fraction of molecules in vapour phase increases

On heating a closed vessel at liquid-vapour equilibrium, more liquid vaporizes as temperature rises, so the fraction of molecules in the vapour phase increases, while the total number of vapour molecules does not remain constant.

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