Question

$D_{2}O$ differ in the following except:

• A. freezing point
• B. density
• C. ionic product of water
• D. its reaction with sodium

Answer 1

Answer: (D)

its reaction with sodium

The freezing point of water is $0^{o}C$, whereas the freezing point of heavy water is ${3.8}^{0}C$.

At ${20}^{0}C$, the density of water is $0.9982$ g/mL, whereas the density of heavy water is $1.1056$ g/mL.

Similarly, water and heavy water differ in the value of the ionic product.

However, the chemical properties (such as reaction with sodium) of water are similar to that of heavy water due to the same electronic configuration.