QJEEM02Chd707: JEE Main 2002 Chemistry - Class 11 JEEM02Chd707 Solution: The metallic sodium disolves in liquid ammonia to form a deep…

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The metallic sodium disolves in liquid ammonia to form a deep blue coloured solution. The deep blue colour is due to formation of :

Accepted Answer

The alkali metals dissolve in liquid ammonia without evolution of hydrogen. The metal loses electrons and combine with ammonia molecule.

M \to M^{+}

(in liquid ammonia)

+ E^{-}

(ammoniated)

M + (x + y) N H_{3}

\to {[M {(N H_{3})}_{x}]}^{+} \underset{S o l v a t e d e l e c t r o n}{+ e^{-} {(N H_{3})}_{y}}

It is ammoniated electron which is responsible for color.

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