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 alkali metals in liquid ammonia ?

Options

A. The blue colour is due to ammoniated electron
B. The solution is paramagnetic
C. The blue colour changes to brown on standing
D. The concentrated solution blue colour changes to bronze and becomes diamagnetic

Answer

C

Explanation

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))`