Heavy water is obtained by

Q.

Heavy water ($D_{2}O$) is

Q. 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 ordinary water is greater than that of heavy water.

Choose the correct statements(s).

Q. 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:

Q. Heavy water is obtained by ?

Q. Which of the following is present in the heavy oil obtained during petroleum distillation ?