Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

{[C r {({N H}_{3})}_{6}]}^{3 +}

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{[C o {({N H}_{3})}_{6}]}^{3 +}

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{[N i {({N H}_{3})}_{6}]}^{2 +}

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{[Z n {({N H}_{3})}_{6}]}^{2 +}

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Solution

The correct option is C ${[N i {({N H}_{3})}_{6}]}^{2 +}$
$[N i (N H_{3})_{6}]^{2 +}$ is an outer orbital complex as it involves 4d orbital in the hybridization and exhibits paramagnetic behavior as it has two unpaired electrons as shown in the figure.

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Similar questions

[C o (N H_{3})_{6}]^{3 +}

[N i (N H_{3})_{6}]^{2 +}

Column-I	Column-II
(a) $[N i (N H_{3})_{6}]^{2 +}$	(p) $d^{2} s p^{3}$ and diamagnetic
(b) $[C r (N H_{3})_{6}]^{3 +}$	(q) $s p^{3} d^{2}$ and diamagnetic
(c) $[C o (N H_{3})_{6}]^{3 +}$	(r) $s p^{3} d^{2}$ and two unpaired electrons
(d) $[Z n (N H_{3})_{6}]^{2 +}$	(s) $d^{2} s p^{3}$ and three unpaired electrons.

[C o (N H_{3})_{6}]^{3 +}

[M n F_{6}]^{3 -}

[C o (C N)_{6}]^{3 -}

[C r (N H_{3})_{6}]^{3 +}

[C u (N O_{2})_{6}]^{4 -}

[F e (H_{2} O)_{6}]^{3 +}

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