Which of the following on thermal decomposition gives oxygen gas ?

Which of the following on thermal decomposition gives oxygen gas ?
  1. $\mathrm{Ag}_{2} \mathrm{O}$
  2. $\mathrm{Pb}_{3} \mathrm{O}_{4}$
  3. $\mathrm{PbO}_{2}$
  4. All of these

Solution

$\begin{aligned} & 2 \mathrm{Ag}_{2} \mathrm{O}(\mathrm{s}) \longrightarrow 4 \mathrm{Ag}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{~g}) \\ & 2 \mathrm{~Pb}_{3} \mathrm{O}_{4}(\mathrm{~s}) \longrightarrow 6 \mathrm{PbO}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{~g}) \\ & 2 \mathrm{PbO}_{2}(\mathrm{~s}) \longrightarrow 2 \mathrm{PbO}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{~g}) \end{aligned}$ *

Asked in: JEE-TOPICTESTS-CHEMISTRY

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