Which among the following formulae is correctly represented according to stock notation?

Which among the following formulae is correctly represented according to stock notation?
  1. $\mathrm{Fe}(\mathrm{II}) \mathrm{Cl}_3$
  2. $\mathrm{Mn}$ (II) $\mathrm{O}_2$
  3. $\mathrm{Au}$ (III) $\mathrm{Cl}$
  4. $\mathrm{Sn}$ (IV) $\mathrm{Cl}_4$

Solution

$\begin{array}{ll}\mathrm{FeCl}_3 \rightarrow \mathrm{Fe}^{+3} & \mathrm{Fe} \text { (III) } \mathrm{Cl}_3 \\ \mathrm{MnO}_2 \rightarrow \mathrm{Mn}^{+4} & \mathrm{Mn} \text { (IV) } \mathrm{O}_2 \\ \mathrm{AuCl} \rightarrow \mathrm{Au}^{+1} & \mathrm{Au}(\mathrm{I}) \mathrm{Cl} \\ \mathrm{SnCl}_4 \rightarrow \mathrm{Sn}^{+4} & \mathrm{Sn} \text { (IV)Cl }{ }_4\end{array}$

Asked in: MHT CET 2021 (23 Sep Shift 2)

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