The alkali metals dissolve in ammonia to give a deep blue solution which is cnducting in nature.
`M+(x+y)NH_(3)to[M(NH_(3))_(x)]^(2+)+2[e(NH_(3))_(y)]^(-)` which of the followin is not true about the solutions of alkali metals in liquid ammonia?

Options

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

Answer

C