Chemistry-Colligative Properties
NEET Chemistry Colligative Properties Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 12
Assertion (A): The presence of a non-volatile solute in a solution results in the lowering of the solvent's vapor pressure. | Reason (R): The relative lowering of vapor pressure of the solvent over a solution is equal to the mole fraction of the solute.
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
The assertion and reason correctly describe the colligative property of vapor pressure lowering, where the presence of a non-volatile solute reduces the vapor pressure of the solvent, and this effect is quantitatively explained by Raoult's law as the mole fraction of the solute.
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