1.

The alkali metals dissolve in ammonia to give a deep blue solution which is conducting in nature. M+(x+y)NH_3rarr[M(NH_3)_x]^(2+)+2[e(NH_3)_y]^(-) Which of the following is not true about the solutions of alkli metals in liquid ammonia ?

Answer»

The blue colour is due to ammoniated electron
The solution is paramagnetic
The blue colour CHANGES to brown on standing
The concentrated solution blue colour charges to BRONZE and becomes diamagnetic

Solution :On standing its slowly libeerates HYDROGEN resulting in formation of aminde.
`M _((AQ)^(-)e_((aq)^(-) + NH_(3(l)) to MNH_(2(aq)) +1/2 H_(2(g))`


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