Question

On dissolving smaller (less than 3M) amount of sodium metal in liquid ammonia at low temperature, which one of the following does not occur?

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

Answer 1

Answer: (D)

Liquid ammonia remains diamagnetic.

Dilute solution of Na metal in liquid ammonia is deep blue coloured and highly conducting and paramagnetic in nature because of solvated cations and solvated electrons.

$M+(x+y)N{H}_3\to \left[M\right(N{H}_3{)}_x{]}^{+}+\left[e\right(N{H}_3{)}_y{]}^{-}$