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Question

Which of the following statements are true about the dilute solutions of alkali metals in liquid ammonia?

A
They are deep blue coloured solutions.
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B
They are highly conducting in nature.
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C
They are diamagnetic in nature.
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D
Ammoniated cations and ammoniated anions are formed in the solution.
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Solution

The correct options are
A They are deep blue coloured solutions.
C Ammoniated cations and ammoniated anions are formed in the solution.
D They are highly conducting in nature.
M+(x+y)NH3 4[M(NH3)x]+ + [e(NH3)y]
Solutions are deep blue coloured due to the absorption of light in visible region by solvated electrons. It is paramagnetic due to the presence of the unpaired electrons and not diamagnetic.

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