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. \[N{{a}^{+}}+(x+y)\,N{{H}_{3}}+{{e}^{-}}\xrightarrow{{}}\underset{\begin{smallmatrix} ammoniated \\ sodium \end{smallmatrix}}{\mathop{{{[Na\,{{(N{{H}_{3}})}_{x}}]}^{+}}}}\,\] \[\underset{\begin{smallmatrix} ammoniated \\ electrons \\ (blue) \end{smallmatrix}}{\mathop{+\,\,{{[\,e\,{{(N{{H}_{3}})}_{y}}]}^{-}}}}\,\]
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