Which of the following is diamagnetic in nature ?

Which of the following is diamagnetic in nature ?
  1. $\mathrm{CrCl}_{3}$
  2. $\mathrm{ZnCl}_{2}$
  3. $\mathrm{NiCl}_{4}^{2-}$
  4. $\mathrm{CuSO}_{4}$

Solution

$\mathrm{Zn}^{2+}$ in $\mathrm{ZnCl}_{2}$ has a $\mathrm{d}^{10}$ configuration where all the electrons are paired up and thus $\mathrm{ZnCl}_{2}$ is diamagnetic. *

Asked in: JEE-TOPICTESTS-CHEMISTRY

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