There are four complexes of Ni. Select the complex(es) which will be attracted by magnetic field: (I) Ni(CN)42− (II) NiCl42− (iii) NiCO4 (iv) NiH2O62+
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a
I only
b
IV only
c
II, III and IV
d
II and IV
answer is D.
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Detailed Solution
Paramagnetic complex will be attracted by magnetic field.Diamagnetic complexes will be repelled by magnetic field. Ni(CN)42− →0 unpaired electron. NiCl42− →2 unpaired electron. Ni(CO)4 →0 unpaired electron. NiH2O62+ →2 unpaired electron.