Alakali metals (IA) are generally soluble with liquid ammonia (Liq. $ \mathrm{NH}_{3} $ ) and provides blue colour solution and shows paramagnetic behavior, so what could be the reason to provide blue colour and paramagnetic behavior?

Question

Alakali metals (IA) are generally soluble with liquid ammonia (Liq. $ \mathrm{NH}_{3} $ ) and provides blue colour solution and shows paramagnetic behavior, so what could be the reason to provide blue colour and paramagnetic behavior?, $ \left[\mathrm{M}\left(\mathrm{NH}_{3}\right)_{\mathrm{x}}\right]^{+} $and $ \left[\mathrm{e}\left(\mathrm{NH}_{3}\right)_{\mathrm{y}}\right]^{-} $, $ \left[\mathrm{e}\left(\mathrm{NH}_{3}\right)_{y}\right]^{-} $, $ \left[\mathrm{e}\left(\mathrm{NH}_{3}\right)_{\mathrm{y}}\right]^{-} $and $ \left[\mathrm{M}\left(\mathrm{NH}_{3}\right)_{\mathrm{x}}\right]^{+} $, $ \left[\mathrm{M}\left(\mathrm{NH}_{3}\right)_{\mathrm{x}}\right]^{+} $

MARKS App · Accepted Answer

The colour is due to the presence of solvated electrons in ammonia. It also imparts paramagnetic character to the solution.

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