Assertion : Melting and boiling points of `D_(2)O` are higher than those of ordinary `H_(2)O`. Reason : `D_(2)O` has lesser degree of association and lower molecular mass than `H_(2)O`.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false.

Assertion : Melting and boiling points of `D_(2)O` are higher than tho

1.	Assertion : Melting and boiling points of `D_(2)O` are higher than those of ordinary `H_(2)O`. Reason : `D_(2)O` has lesser degree of association and lower molecular mass than `H_(2)O`.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false.
Answer» Correct Answer - C `D_(2)O` has higher molecular mass and greater degree of association than `H_(2)O` and thus, has higher melting and boiling points.

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