Question

Statement I: Alkali metals dissolve in liquid ammonia to give blue solutions.
Statement II: Alkali metals in liquid ammonia give solvated species of the type `[M(NH_(3))_(n)]^(o+)` (M = alkali metals).
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer 1

Correct Answer - a
Alkali metals with ammonia give blue colour due to ammoniated `e^(-).`
`Na+(x+y)NH_(3) rarr [Na(NH_(3))_(y)]^(+)+[e(NH_(3))_(x)]^(-)`
solvated `(` blue colour `)` electron.