A) tin
B) lead
C) sodium
D) silver
E) zinc
Correct Answer: C
Solution :
Alkali metals dissolve in liquid\[N{{H}_{3}}\]giving deep blue solution. The colour deepens with increase in concentration of the solution. When the alkali metals are dissolved in liquid. \[N{{H}_{3}},\]the ammonia molecule solvate the cation as well as the electron as: \[M+\underset{(excess)}{\mathop{N{{H}_{3}}}}\,\xrightarrow[{}]{{}}{{M}^{+}}{{(N{{H}_{3}})}_{x}}+\underset{\begin{smallmatrix} ammoniated \\ \,\,\,\,electron \end{smallmatrix}}{\mathop{{{e}^{-}}{{(N{{H}_{3}})}_{x}}}}\,\] The blue colour of the solution is due to the ammoniated electrons. Due to these ammoniated electrons these solution also behaves as strong reducing agents.
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