Among [Fe(CN)6]^3-, [FeF6]^3- (F- weak-field), [Fe(CN)6]^4- and low-spin [Co(NH3)6]^3+, the largest spin-only magnetic moment is shown by:

JEE Main levelSingle correct optionDifficulty 2 of 3cc182

Among $[Fe (CN) X_{6}] X^{3 -}$ , $[FeF X_{6}] X^{3 -}$ ( $F X^{-}$ weak-field), $[Fe (CN) X_{6}] X^{4 -}$ and low-spin $[Co (NH X_{3}) X_{6}] X^{3 +}$ , the largest spin-only magnetic moment is shown by:

[Fe (CN) X_{6}] X^{3 -}

is low-spin

d^{5}

(

n = 1

1.73

BM).

[FeF X_{6}] X^{3 -}

is high-spin

d^{5}

(

n = 5

35 = 5.92

BM).

[Fe (CN) X_{6}] X^{4 -}

(

d^{6}

low spin) and

[Co (NH X_{3}) X_{6}] X^{3 +}

(

d^{6}

low spin) have

n = 0

. The largest is

[FeF X_{6}] X^{3 -}