Question

Which property among the following is same for both hydrogen and deuterium molecules?

• A. Bond energy
• B. Melting point
• C. Boiling point
• D. Bond length

Answer 1

Answer: (D)

Both hydrogen $(H_2)$ and deuterium $(D_2)$ molecules have same bond length but have different bond energy, melting point and boiling Point.
Property
Hydrogen $({\mathbf{H}}_2)$ 74pm
Deuterium (P2) $({\mathbf{D}}_2)$ 74pm
Bond energy
$\text{436kJ mo}{\text{l}}^{\text{-1}}$
$\text{443}.\text{3kJ mo}{\text{l}}^{\text{-1}}$
M.P.
$0.00{}^{\circ }\text{C}$
$\text{3}.\text{81}{}^{\circ }\text{C}$
B.P.
$\text{1}00.0{}^{\circ }\text{C}$
$\text{1}0\text{1}.\text{42}{}^{\circ }\text{C}$