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Question

Which of the following complex(es) is/are paramagnetic in nature ?

A
K2[NiF6]
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B
K3[CoF6]
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C
K3[Fe(CN)6]
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D
[Co(H2O)6]3+
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Solution

The correct options are
B K3[CoF6]
C K3[Fe(CN)6]
K3[CoF6] and K3[Fe(CN)6] posses paramagnetic behaviour because both the compounds have unpaired electrons on central metal atom.
Hence options B & C are correct.

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