Assertion (A): The sum of mole fractions of all the component of a solution is unity.
Reason (R ): The mole fraction is a temperature dependent quantity.

Options

A. If both `(A)` and `(R )` are correct, and `(R )` is the correct explanation of `(A)`.
B. If both `(A)` and `(R )` are correct, but `(R )` is not the correct explanation of `(A)`.
C. If `(A)` is correct, but `(R )` is incorrect.
D. If `(A)` is incorrect, but `(R )` is correct.

Answer

C

Explanation

The sum of mole fraction is always unity and it is not temperature dependent.