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When sodium is dissolved in liquid ammon...

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

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Sodium gets dissolved in liquid ammonia because of ammoniated cations.
`Na^(o+)+(x+y)NH_(3)rarr underset("cations")underset("Ammonia")([Na(NH_(3))_(x)]^(o+))+underset("electrons")underset("Ammonia")([e(NH_(3))_(y)]^(Θ))`
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