Assertion (A): NaCl is less soluble in heavy water than in ordinary water.
Reason (R): Dielectric constant of ordinary water is more than that of heavy water.

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
C. (A) is true, but (R) is not true
D. (A) is not true, but (R) is true

Answer

(a)

Explanation

The dielectric constant of ordinary water (81) is greater than that of heavy water (80), hence NaCl is less soluble in heavy water.