Question

On dissolving moderate amount of sodium metal in liquid $N{H}_3$ at low temperature, which one of the following does not occur?

• A. Blue coloured solution is obtained
• B. $N{a}^{+}$ ions are formed in the solution
• C. Liquid $N{H}_3$ becomes good conductor of electricity
• D. Liquid ammonia remains diamagnetic

Answer 1

The correct option is D Liquid ammonia remains diamagnetic

Sodium dissolves in liquid ammonia to form blue solution which is good conductor of electricity.The blue colour of the solution is due to formation of ammoniated electrons.
$Na\to N{a}^{+}+e^{-}$
$N{a}^{+}+xN{H}_3\to N{a}^{+}(N{H}_3{)}_x$
$e^{-}+yN{H}_3\to \left[e\right(N{H}_3{)}_y{]}^{-}$ ammoniated electron
Due to presence of unpaired electron liquid ammonia becomes paramagnetic.

Hence option $D$ is correct.