A) green
B) blue
C) pink
D) yellow
Correct Answer: B
Solution :
When alkali metals are dissolved in liquid ammonia, a blue coloured solution is obtained. This solution is paramagnetic in nature. \[N{{a}^{+}}+(x+y)N{{H}_{3}}+{{e}^{-}}\xrightarrow{{}}\underset{\begin{smallmatrix} \text{ammoniated} \\ \text{sodium} \end{smallmatrix}}{\mathop{{{[Na{{(N{{H}_{3}})}_{x}}]}^{+}}}}\,\] \[\underset{\begin{smallmatrix} \text{ammoniated} \\ \text{electrons} \\ \text{(blue)} \end{smallmatrix}}{\mathop{+{{[e{{(N{{H}_{3}})}_{y}}]}^{-}}}}\,\]
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