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A cyllnder filled with a movable piston ...

A cyllnder filled with a movable piston contains liquid water in equilibrium with water vapour at `25^(@)C`. Which one of the following operations results in a decrease In the equilibrium vapour pressure ?

A

Moving piston downward a short distance

B

Removing a small amount of the liquid water

C

Dissolving salt in the water

D

Removing a small amount of vapour

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The correct Answer is:
C
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