Pick out the correct statement/s\

Question

Professor PC Thomas Classes · Answer

All the given statements are correct.\ $\mathrm{MnO}_{2}+4 \mathrm{HC} \ell ightarrow \mathrm{MnCl}_{2}+\mathrm{Cl}_{2}+2 \mathrm{H}_{2} \mathrm{O}$\ $2 \mathrm{H}_{2} \mathrm{O}_{2} \xrightarrow{\mathrm{MnO}_{2}} 2 \mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}$\ $\mathrm{MnO}_{2} \xrightarrow[\Delta]{\mathrm{KOH} / \mathrm{KNO}_{3}} \mathrm{~K}_{2} \mathrm{MnO}_{4}$\