Which one of the following properties shows that hydrogen resembles alkali metals ?

Options

A. It shows metallic character like alkali metals
B. It is diatomic like alkali metals.
C. Its ionization energy is of the same order as that of alkali metals.
D. When hydrogen halides and alkali metal halides are electrolysed, hydrogen and alkali metals are liberated at the cathode.

Answer

D

Explanation

Hydrogen and alkali metals are electropositive & electronegative is very less i.e. H - 2.1, Li 1.0, Na and k = 0.8, Rb = 0.8
At cathode
`H^(+)toe^(-)to-1/2H_(2)`
`NaCl toNa^(+)+Cl^(-)`
At cathode `Na^(+)+e^(-)toNa`