A non-volatile solute (A) is dissolved in a volatile solvent (B). The vapour pressure of the solution is The vapour pressure of pure solvent is . If X is the mole fraction then which of the following is correct.

# A non-volatile solute (A) is dissolved in a volatile solvent (B). The vapour pressure of the solution is The vapour pressure of pure solvent is . If X is the mole fraction then which of the following is correct.

1. A 2. B 3. C 4. D Fill Out the Form for Expert Academic Guidance!l

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### Solution:

Concept-  According to Raoult's law, a solvent's partial vapour pressure in a solution (or mixture) is equal to or the same as the pure solvent's vapour pressure times the mole fraction present in the solution.
Raoult's law equation is expressed mathematically as; Where,
Solution = vapour pressure of the solution
Χsolvent  = mole fraction of the solvent
P 0 solvent is equal to the pure solvent's vapour pressure.
By Raoult’s law, But A is a non-volatile solute
So  Hence, the correct answer is option 3).

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