Question

A solution of $Na$ in liquid $N{H}_3$ is

• A. green
• B. blue
• C. pink
• D. yellow

Answer 1

Answer: (B)

When alkali metals are dissolved in liquid ammonia, a blue coloured solution is obtained. This solution is paramagnetic in nature. $N{a}^{+}+(x+y)N{H}_3+e^{-}⟶\underset{\text{ammoniated sodium}}{{\left[Na{\left(N{H}_3\right)}_x\right]}^{+}}+\underset{\text{ammoniated electrons (blue)}}{{\left[e{\left(N{H}_3\right)}_y\right]}^{-}}$