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Answers (1)
A Ankit

@sushma 

Answer 4

The reason for the first option-

All alkali metal( Na, K, etc.)  dissolves in liquid ammonia giving deep blue solutions which are conducting in nature. These solutions contain ammoniated cations and ammoniated electrons as shown below:

M + ( x + y ) NH3 → M+(NH3 )x + e-(NH3)y

The blue colour of the solution is considered to be due to ammoniated electrons which absorb energy corresponding to the red region of the visible light

For 2nd and 4th -

The solution are paramagnetic and in the presence Of impurities

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