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Q. When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to

Solution:

$M +( x + y ) NH _{3} \rightarrow M ^{+}\left( NH _{3}\right)_{ x }^{+}+ e ^{-}\left( NH _{3}\right)_{ y }$ Ammoniated electrons are the responsible for the formation of bluce colour solution