The vapour pressure of a solution having solid as solute and liquid as solvent is:

Directly proportional to mole fraction of the solvent

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Inversely proportional to mole fraction of the solvent

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Directly proportional to mole fraction of the solute

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Inversely proportional to mole fraction of the solute

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Solution

The correct option is B Directly proportional to mole fraction of the solvent
The vapor pressure of the solvent above a solution containing a non-volatile solute (i.e., a solute that does not have a vapor pressure of its own) is directly proportional to the mole fraction of solvent in the solution. This behavior is summed up in Raoult's Law $P_{S o l u t i o n}^{o} = X_{s o l v e n t} \times P_{s o l v e n t}^{o}$

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