Question

In which of the following solvents, the alkali metal gives coloured solutions?
(A) Water
(B) Alcohol
(C) Acetone
(D) Liquid ammonia

Answer 1

Alkali metal gives colored solutions in liquid ammonia.

It gets dissolved in liquid ammonia and gives a deep blue color, which comes due to ammoniated electrons which are responsible for absorbing energy in the detectable range of light.

As this solution contains ammoniated electrons and cations these are conducting in nature.

Answer 2

liquid ammonia is the correct answer