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The correct order of number of unpaired electrons in the Complex
A. ${[F e {(C N)}_{6}]}^{3 -}$ B. ${[F e F_{6}]}^{3 -}$ C. ${[C o F_{6}]}^{3 -}$ D. ${[C r {(o x a l a t e)}_{3}]}^{3 -}$ E. $[N i {(C O)}_{4}]$

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A<E<D<C<B

E<A<D<C<B

E<A<B<D<C

A<E<C<B<D

answer is B.

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Detailed Solution

$\begin{array}{l} n \\ A) {[F e {(C N)}_{6}]}^{3 -} 1 \\ B) {[F e F_{6}]}^{3 -} 5 \\ C) {[C o F_{6}]}^{3 -} 4 \\ D) {[C r {(o x)}_{3}]}^{3 -} 3 \\ E) [N i {(C O)}_{4}] 0 \end{array}$

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