Chemistry-Raoult's Law
NEET Chemistry Raoult's Law Assertion Reason Question
Type: Assertion Reason-assertion-Easy-Class 12
Assertion (A): In a solution, the vapour pressure of the solvent is lower than that of the pure solvent. | Reason (R): Solute particles occupy part of the surface area, reducing the rate of evaporation of solvent molecules.
A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false.
Correct Answer
Option A
Detailed Explanation
Both the assertion and reason are true. The presence of solute particles on the surface of the solution reduces the surface area available for solvent evaporation, leading to a decrease in vapour pressure compared to the pure solvent.
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