Potassium permanganate on heating gives potassium manganate, oxygen and $\mathrm{X}$. For which of the…

Potassium permanganate on heating gives potassium manganate, oxygen and $\mathrm{X}$. For which of the following reactions, $\mathrm{X}$ is used as a catalyst.
  1. $2 \mathrm{KClO}_3 \underset{\Delta}{\longrightarrow} 2 \mathrm{KCl}+3 \mathrm{O}_2$
  2. $2 \mathrm{SO}_2+\mathrm{O}_2 \longrightarrow 2 \mathrm{SO}_3$
  3. $4 \mathrm{HCl}+\mathrm{O}_2 \longrightarrow 2 \mathrm{Cl}_2+2 \mathrm{H}_2 \mathrm{O}$
  4. $4 \mathrm{NH}_3+5 \mathrm{O}_2 \longrightarrow 4 \mathrm{NO}+6 \mathrm{H}_2 \mathrm{O}$

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (26 Apr Shift 2)

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