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Relative Lowering of Vapour Pressure

At 300K, when...

Question

At 300K, when a solute is added to a solvent its vapour pressure over mercury reduces from 50 mm to 45 mm. The value of mole fraction of solute will be:

A

0.005

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B

0.010

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C

0.100

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D

0.900

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Solution

The correct option is C 0.100

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