Question

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

• A. solvated electrons, e$^{-(NH_3)_x}$
• B. solvated atomic sodium Na(NH_3)_4
• C. (Na$^{+}$ + Na)
• D. (NaNH_2 + H_2)

Hint:

The color change in the solution indicates the presence of solvated electrons, which are responsible for the blue color.

Answer 1

The Correct Option is A

The deep blue color observed when sodium is dissolved in liquid ammonia is due to the presence of solvated electrons.
These electrons are free to move within the solution, creating the characteristic color.
This phenomenon occurs because sodium metal dissociates to produce Na$^{+}$ ions, leaving behind free electrons that are solvated by ammonia molecules.