Q. 12

When sodium is di A. ammoniated electron

B. sodium ion

C. sodium amide

D. ammoniated sodium ion

Answer :

Alkali metals like sodium dissolve in liquid ammonia to give a deep blue colour. The reaction can be given as

M + (x+y)NH3 [M(NH3)x]+ + [e(NH3)y]-

The deep blue colour is due to the ammoniated electron. It absorbs energy in the visible region of light and thus imparts blue colour to the solution. The correct answer is (i).

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