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Solubility

In a solution...

Question

In a solution if the solute is non- volatile, p_A⁰ is the vapour pressure of pure solvent A and the mole fraction of A is x_A , the vapour pressure of the solvent (p_A) will be :

A

x p_A⁰ / (1-x)

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B

(1-x) p_A⁰ / x

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C

1-x) p_A⁰

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D

x p_A⁰

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Solution

The correct option is D
x p_A⁰

Vapour pressure of the solvent is given by the product of mole fraction of A and vapour pressure of pure solvent A.

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