When a non-volatile solute is dissolved in a solvent, the relative lowering of vapour pressure is equal to :

mole fraction of solvent

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mole fraction of solute

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molarity of solution

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molality of solution

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Solution

The correct option is B mole fraction of solute
We have,
relative lowering of vapour pressure; $\frac{P_{B}^{0} - P_{t}}{P_{B}^{0}} = x_{A}$
where A = solute and B = solvent
so, relative lowering of vapour pressure is equals to mole fraction of solvent.

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Q. The vapour pressure of a solvent decreased by

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. What would be the mole fraction of solvent if decrease in vapour pressure is

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When a non-volatile solute is dissolved in a solvent, the relative lowering of vapour pressure is equal to :

The correct option is B mole fraction of soluteWe have,relative lowering of vapour pressure; P0B−PtP0B=xAwhere A = solute and B = solventso, relative lowering of vapour pressure is equals to mole fraction of solvent.

The correct option is B mole fraction of solute
We have,
relative lowering of vapour pressure; $\frac{P_{B}^{0} - P_{t}}{P_{B}^{0}} = x_{A}$
where A = solute and B = solvent
so, relative lowering of vapour pressure is equals to mole fraction of solvent.