Q.

Match the following(SFL=Strong field ligand & WFL=Weak field ligand)A. d3(WFL)       P. Zero unpaired electronsB.d6(SFL)        Q. Three unpaired electronsC.d6(WFL)       R. One unpaired electronsD.d9(SFL)        S. Four unpaired electrons

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a

A-Q,B-S,C-P,D-R

b

A-R,B-P,C-S,D-Q

c

A-Q,B-P,C-S,D-R

d

A-R,B-S,C-Q,D-P

answer is C.

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Detailed Solution

When strong field Ligand is present then Hund rule is disobeyed. That means pairing of electrons takes place. But when weak field Ligand is present then Hund rule is obeyed and the electrons are filled after the orbitals are half filled.
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Match the following(SFL=Strong field ligand & WFL=Weak field ligand)A. d3(WFL)       P. Zero unpaired electronsB.d6(SFL)        Q. Three unpaired electronsC.d6(WFL)       R. One unpaired electronsD.d9(SFL)        S. Four unpaired electrons