Which of the following pairs of substances ex | vedclass

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(D) Paramagnetism is exhibited by substances that contain unpaired electrons.$K_2SO_4$: $K^+$ has $3p^6$ configuration (all paired).$MgCl_2$: $Mg^{2+}

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$FeSO_4, NiCl_2$

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(D) Paramagnetism is exhibited by substances that contain unpaired electrons.$K_2SO_4$: $K^+$ has $3p^6$ configuration (all paired).$MgCl_2$: $Mg^{2+}$ has $2p^6$ configuration (all paired).$ZnO$: $Zn^{2+}$ has $3d^{10}$ configuration (all paired).$FeSO_4$: $Fe^{2+}$ has $3d^6$ configuration,which contains $4$ unpaired electrons.$NiCl_2$: $Ni^{2+}$ has $3d^8$ configuration,which contains $2$ unpaired electrons.Therefore,the pair $FeSO_4$ and $NiCl_2$ exhibits paramagnetism.

Which of the following pairs of substances exhibit paramagnetism among $K_2SO_4$,$MgCl_2$,$FeSO_4$,$NiCl_2$,and $ZnO$?

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