Question

The metallic sodium dissolves in liquid ammonia to form a deep blue coloured solution. The deep blue colour is due to the formation of 

(a) solvated electron e^- (NH₃)x

(b) solvated atomic sodium, Na(NH₃)y

(c) (Na⁺+Na^-)

(d) NaNH₂+H₂

Answer 1

Correct option(a) solvated electron e^- (NH₃)x

Explanation:

All alkali metals dissolve in liquid ammonia and give solvated ammoniated electrons.

These electrons are excited to higher energy levels anti the absorption of photons occurs in the red region of the spectrum. Thus, the solution appears blue.