Question

Which of the following is not true ?

• A. Ordinary water is electrolysed more rapidly than D2O.
• B. D2O freezes at lower temperature than H2O.
• C. Reaction between H2 and Cl2 is much faster than D2 and Cl2.
• D. Bond dissociation energy for D2 is greater than H2.

Answer 1

Answer: (B)

D2O freezes at lower temperature than H2O.

Answer 2

Freezing point of D2O and H2O are 276.8 K and 273 K respectively.