When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution due to:(A) Ammoniated electron(B) Sodium ion(C) Sodium amide(D) Ammoniated sodium ion

The deep blue color observed when sodium is dissolved in liquid ammonia is due to the formation of an ammoniated electron, which is represented as (A) Ammoniated electron.

When sodium dissolves in liquid ammonia, it undergoes a chemical reaction to produce sodium cations (Na+) and solvated electrons (e^-). The solvated electrons are produced by the transfer of electrons from sodium to ammonia molecules. These solvated electrons can exist in the ammonia solution due to the strong reducing properties of ammonia. The presence of solvated electrons is responsible for the characteristic blue color of the solution.

The other options (B) Sodium ion, (C) Sodium amide, and (D) Ammoniated sodium ion are not responsible for the deep blue color observed in this specific case. The color is primarily attributed to the presence of solvated or ammoniated electrons in the solution.