Question

Highly pure dilute solution of sodium in liquid ammonia:

• A. on evaporation yield metals.
• B. exhibits electrical conductivity.
• C. produces sodium amide and hydrogen gas instantly.
• D. acts as powerful reducing agent.

Answer 1

Answer: (A), (B), (D)

acts as powerful reducing agent.
on evaporation yield metals.
exhibits electrical conductivity.

Dilute solution of sodium in liquid ammonia-

$M+(x+y)N{H}_3\to \left[M\right(M{H}_3{)}_x{]}^{+}+\left[4\right(N{H}_3{)}_y{]}^{-}$.

On evaporation yields Na metal.

Blue colour of the solution is due to ammoniated electrons and it is good conductor of electricity because of both ammoniated cations and ammoniated electrons.

Ammonia reduces in the given reaction, so Na solution acts as reducing agent.
Option A, B and D are correct.