Q.

A liquid is kept in a closed vessel. If a glass plate (negligible mass) with a small hole is kept on top of the liquid surface, then the vapour pressure of the liquid in the vessel is:

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a

More than what would be if the glass plate were removed

b

Same as what would be if the glass plate were removed

c

Less than what would he if the glass plate were removed

d

Cannot be predicted

answer is B.

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Detailed Solution

Vapour pressure does not depend on surface area of liquid. (it depends on temperature and nature of solvent).
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