Which of the following conversions is carried out by using charcoal catalyst?

1. $\mathrm{SO}_2(g)+\mathrm{Cl}_2(g) \rightarrow \mathrm{SO}_2 \mathrm{Cl}_2(l)$
2. $4 \mathrm{HCl}+\mathrm{O}_2 \rightarrow 2 \mathrm{Cl}_2+2 \mathrm{H}_2 \mathrm{O}$
3. $2 \mathrm{SO}_2(g)+\mathrm{O}_2(g) \rightarrow 2 \mathrm{SO}_3(g)$
4. $2 \mathrm{ZnS}(s)+3 \mathrm{O}_2(g) \rightarrow 2 \mathrm{ZnO}(s)+2 \mathrm{SO}_2(g)$

Solution

Asked in: MHT CET 2022 (08 Aug Shift 2)

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