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Assertion : Melting and boiling points o...

Assertion : Melting and boiling points of `D_2O` are higher than those of ordinary `H_2O`.
Reason : `D_2O` has lesser degree of association and lower molecular mass than `H_2O`.

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 both (A) and (R) are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
C
`D_2O` has highermolecular mass and greater degree of association than `H_2O`ạnd thus has higher melting and boiling points.
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