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 $\mathbf{(}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{)}$ 74pm
Deuterium (P2) $\mathbf{(}{{\mathbf{D}}_{\mathbf{2}}}\mathbf{)}$ 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.
$\text{1}00.0{}^\circ \text{C}$
$\text{1}0\text{1}.\text{42}{}^\circ \text{C}$