Which among the following reactions exhibits the reducing property of ozone?

Which among the following reactions exhibits the reducing property of ozone?
  1. $\mathrm{PbS}_{(\mathrm{s})}+4 \mathrm{O}_{3(\mathrm{~g})} \rightarrow \mathrm{PbSO}_{4(\mathrm{~s})}+4 \mathrm{O}_{2(\mathrm{~g})}$
  2. $\mathrm{BaO}_{2(\mathrm{~g})}+\mathrm{O}_{3(\mathrm{~g})} \rightarrow \mathrm{BaO}_{(\mathrm{s})}+2 \mathrm{O}_{2(\mathrm{~g})}$
  3. $\mathrm{NO}_{(\mathrm{g})}+\mathrm{O}_{3(\mathrm{~g})} \rightarrow \mathrm{NO}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})}$
  4. $2 \mathrm{KI}_{(\mathrm{aq})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{l})}+\mathrm{O}_{3(\mathrm{~g})} \rightarrow 2 \mathrm{KOH}_{(\mathrm{aq})}+\mathrm{I}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})}$

Solution

Ozone is a reducing agent: Ozone converts peroxides to oxides and is converted to oxygen in exchange. Barium peroxide is reduced to barium oxide by ozone. $\mathrm{BaO}_2+\mathrm{O}_3 \rightarrow \mathrm{BaO}+2 \mathrm{O}_2$

Asked in: MHT CET 2021 (24 Sep Shift 2)

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