Question

Which of the following property is less for D₂O than H₂O?

• A. Dielectric constant
• B. Viscosity
• C. Density
• D. Melting point

Hint:

The differences in physical properties between D₂O and H₂O are mostly due to the isotope effect, with D₂O being denser and having lower dielectric constant.

Answer 1

The Correct Option is A

Deuterium oxide (D₂O) has a higher mass than H₂O due to the heavier deuterium isotope. As a result, its dielectric constant is lower than that of H₂O, while other properties like viscosity, density, and melting point are relatively similar.