Consider the following reactions:
`Fe^(2+) overset("excess" CN^(-))rarr P`,
`Fe^(3+) overset("excess" CN^(-))rarr Q`,
Which of the following is correct about P and Q ?

Options

A. `P + Fe^(2+) rarr` Prussian blue coloured precipitate.
B. Iron in both the P and Q, is `d^(2)sp^(3)` hybridised.
C. Complex P is paramagnetic.
D. Complex 'Q' has smaller magnetic moment than P

Answer

B

Explanation

`Fe^(2+) + CH^(-) rarr underset("Yellowish browm")Fe(CN)_(2) darr overset(CH^(-)(exces)rarr underset("Pale yellow solution")[Fe(CH)_(6)]^(4-) overset(Fe^(2+))rarr Feunderset("Bluish white")[Fe(CN)_(6)]^(2-)`
`Fe^(3+) + CH^(-) rarr Feunderset("Brown")(CN)_(3) darr overset("Excess" CN^(-))rarr underset(Q)underset("Yellow solution")[Fe(CN)_(6)]^(3-) overset(Fe^(3+))rarr Fe_(4)underset("Prussian blue")[Fe(CN)_(6)]_(3) darr`