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Chemistry Question on GROUP 1 ELEMENTS

Sodium dissolves in liquid NH3NH_3 to give a deep blue solution. This is due to

A

ammoniated Na+Na^+

B

ammoniated Na−Na^-

C

formation of Na+/Na−Na^+ / Na^- pair

D

amrnoniated electrons

Answer

amrnoniated electrons

Explanation

Solution

M+(x+y)NH3−>[M(NH3)x]++[e(NH3)y]− {M + (x + y)NH_3 -> [M(NH_3)_x]^+ + [e(NH_3)_y]^-} The deep blue colour of the solution is due to the ammoniated electron which absorbs energy in the visible region of light and thus imparts blue colour to the solution.