Question

Heavy water ${(D}_{2}O)$ is___________.

• A. A product of oxygen and hydrogen.
• B. Ordinary water containing dissolved salts of heavy metals.
• C. Water of mineral springs.
• D. Water produced by repeated distillation and condensation.

Answer 1

Answer: (D)

Water produced by repeated distillation and condensation.

Heavy water is deuterium oxide $\left(D_{2}O\right)$. Ordinary water contains a fraction $(1$ in $6000$ parts$)$ of heavy water. On large scale, it is produced by repeated electrolysis of ordinary water containing alkali. It is also produced by repeated distillation and condensation.