Find out total number of paramagnetic complexes which are inner orbital complexes:
$[C r {(N H_{3})}_{6}] C l_{3}, [C o {(N H_{3})}_{6}] {(N O_{3})}_{2}, [N i {(N H_{3})}_{6}] S O_{4}, K_{2} [P t C l_{6}], [V {(H_{2} O)}_{6}] (S O_{4}),$ $[M n {(N H_{3})}_{6}] (S O_{4})$ , $[F e {(H_{2} O)}_{5} (N O)] S O_{4}, K_{3} [C u C l_{4}], N a_{4} [F e {(C N)}_{5} (N O S)]$ .

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answer is 3.

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Detailed Solution

$[C r {(N H_{3})}_{6}] C l_{3}, [N i {(N H_{3})}_{6}] S O_{4}$ and $[M n {(N H_{3})}_{6}] S O_{4}$ are inner orbit complexes and are paramengetic.

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