Statement-1: `[Co^(II)(NH)_(3))_(6)]^(2+)` is not readily oxidized to `[Co^(III)(NH_(3))_(6)]^(3+)` when air is bubbled through it.
Statement-2: Crystal field stabilization energy of `Co(+III)` with a `d^(6)` configuration is higher then for Co(+III) with a `d^(7)` arrangement.

Options

A. Statement-1 is true, statement-2 is true,statement-2 is a correct explanation for statement-1
B. Statement-1 is true, statement-2 is true,statement-2 is NOT a correct explanation for statement-1
C. Statement-1 is true, statement-2 is false
D. Statement-1 is false, statement-2 is true.

Answer

D

Explanation

Statement 1 is false statement. `[Co^(II)(NH_(3))_(6)]^(2+)` is readily oxidised in `[Co^(III)(NH_(3))_(6)[^(3+)` in presence of air due to the higher CFSE value `(-2.4 Delta_(o))` of `d^(6)` configuration than `d^(7)` configuration `(-0.8 Delta_(o))`.