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. If both assertion and Reason are true and the Reason is the correct explanation of the assertion.
B. If both assertion and Reason are true but the reason is not the correct explanation of the assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

A

Explanation

NaCl is less soluble in heavy water than in ordinary water because dielectric constant of ordinary water (i.e., 81) is more than that of heavy water (i.e., 80).