Assertion (A) : `[Fe(CN)_(6)]^(3-)` ion shows magnetic moment corresponding to two unpaired electrons.
Reason (R) : Because it has `d^(2)sp^(3)` type hybridisation.

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true but (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. (A) is false but (R) is true

Answer

D

Explanation

Correct reason : In presence of strong ligand `(CN^(-)), Fe^(3+)` has the elec. Confg. `(3d^(5)=3d^(2)3d^(2)3d^(1)3d^(1)3d^(0)3d^(0)).`
Thus `Fe^(3+)` is `d^(2)s^(3)` hybridised and the complex shows magnetic moment corresponding to one unpaired moment corresponding to one unpaired electrons.