Question

Statements about heavy water are given below.
A. Heavy water is used in exchange reactions for the study of reaction mechanisms.
B. Heavy water is prepared by exhaustive electrolysis of water.
C. Heavy water has higher boiling point than ordinary water.
D. Viscosity of $H_{2}O$ is greater than $D_{2}O$.

Choose the more appropriate answer from the options given below:

• A. A, B and C only
• B. A and B only
• C. A and D only
• D. A and C only

Answer 1

The correct option is A A, B and C only

Heavy water is used in exchange reactions for study of reaction mechanisms.

Heavy water is prepared by exhaustive electrolysis of water.

The boiling point of heavy water is greater than normal water. Because, the molecular weight of heavy water is greater than the normal water.
B.P. of $D_{2}O=374.4K$
B.P. of $H_{2}O=373K$

Deuterium having larger molecular in size makes it heavier, and thus more viscous than regular water.

Hence, option (a) is correct.