Paramagnetism is not exhibited by

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(C) Paramagnetism is exhibited by species containing unpaired electrons.In $CuSO_4 \cdot 5H_2O$,$Cu^{2+}$ has $3d^9$ configuration (one unpaired elect

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$CuI$

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(C) Paramagnetism is exhibited by species containing unpaired electrons.In $CuSO_4 \cdot 5H_2O$,$Cu^{2+}$ has $3d^9$ configuration (one unpaired electron).In $CuCl_2 \cdot 5H_2O$,$Cu^{2+}$ has $3d^9$ configuration (one unpaired electron).In $NiSO_4 \cdot 6H_2O$,$Ni^{2+}$ has $3d^8$ configuration (two unpaired electrons).In $CuI$,the copper ion is $Cu^{+}$,which has a $3d^{10}$ electronic configuration.Since all electrons are paired in the $3d$ subshell,$CuI$ is diamagnetic and does not exhibit paramagnetism.

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