Q.

Pair of complexes, which do not have equal number of unpaired electron(s) ?

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a

Co(CO)4−,Ni(CN)44−

b

CoH2O63+,NiF62−

c

Ni(en)32+,Cr(CN)64−

d

Co(CN)64−,CrNH363+

answer is D.

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Detailed Solution

Unpaired electronCo(CO)4⊖,Ni(CN)44−00  Unpaired electron CoH2O603+,NiF62−0  Unpaired electron Ni(en)322+,Cr(CN)624−  Unpaired electron Co(CN)64−,CrNH363+
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