Assertion (A): Caesium metal when dissolved in liquid amtmonia forms a blue-coloured solution.
Reason(R ): The blue solution is a good conductor of electricity.

Options

A. If both (A) and (R ) are correct and (R ) is the correct explanation of (A).
B. If both (A) and (R ) are correct, but (R ) is not the correct explanation of (A).
C. If (A) is correct, but (R ) is incorrect.
D. If (A) is incorrect, but (R ) is correct.

Answer

B

Explanation

Correct reason: Cs metal when dissolved in liquid ammonia form a blue-coloured solution due to ammoniated electrons,
`Cs(s)+(x+y)NH_(3)rarr[Cs(NH_(3))_(x)]^(o+)[e(NH_(3))_(y)]^(Θ)`
The Blue-coloured solution is good conductor of electricity, due to the presence of ammoniated electrons.