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Stabilisation energy of octahedral complex with $d^{7}$ configuration
A) 1.8 $Δ_{0}$ with one unpaired electron
B) 1.8 $Δ_{0}$ with three unpaired electrons
C) 0.8 $Δ_{0}$ with one unpaired electron
D) 0.8 $Δ_{0}$ with three unpaired electrons

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An Intiative by Sri Chaitanya

A and D

A and B

C and D

B and C

answer is A.

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Detailed Solution

For strong field ligands - $C F S E = (6 \times 0.4 - 1 \times 0.6) = 1.8 Δ_{0}$
one unpaired electron
For weak field ligands
$C F S E = (5 \times 0.4 - 2 \times 0.6) = 0.8 Δ_{0}$ three unpaired electrons

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