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Coordination Complexes

Among i [Co...

Question

Among $(i) [C o (N H_{3})_{5}] C l_{3}, (i i) [N i (N H_{3})_{5}] C l_{2}, (i i i) [C r (H_{2} O)_{6}] C l_{3}, (i v) [F e (H_{2} O)_{6}] C l_{2}$ the complex which is diamagnetic is :

i

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i v

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Solution

The correct option is A $i$
$C o^{+ 3} : 3 d^{6} 45^{\circ}$ strong field legend $(N H_{3})$
$N i^{+ 2} : 3 d^{8} 45^{\circ} S F L (N H_{3})$
$C r^{+ 3} : 3 d^{3} 45^{\circ} W F L (H_{2} O)$
$F e^{+ 2} : 3 d^{6} 45^{\circ} W F L (H_{2} O)$
$C o^{+ 3}$ will be diamagnetic (i)

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