By which of the following methods, \(\mathrm{H}_{2} \mathrm{O}_{2}\) can't synthesized?

By which of the following methods, \(\mathrm{H}_{2} \mathrm{O}_{2}\) can't synthesized?
  1. Aerial oxidation of 2 -ethyl anthraquinol
  2. Addition of ice cold \(\mathrm{H}_{2} \mathrm{SO}_{4}\) on \(\mathrm{PbO}_{2}\)
  3. Lewis addition of ice cold \(\mathrm{H}_{2} \mathrm{SO}_{4}\) on \(\mathrm{BaO}_{2}\)
  4. Electrolysis of \(\left(\mathrm{NH}_{4}ight)_{2} \mathrm{SO}_{4}\) at a high current density

Solution



$\mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{P} \mathrm{bO}_{2} ightarrow \mathrm{P} \mathrm{bSO}_{4} \downarrow+\frac{1}{2} \mathrm{O}_{2}+\mathrm{H}_{2} \mathrm{O}\left(\mathrm{P} \mathrm{bO}_{2}ight.$ is not peroxy compound)
$$
\mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{BaO}_{2} ightarrow \mathrm{BaSO}_{4} \downarrow+\mathrm{H}_{2} \mathrm{O}_{2}
$$
$$
\left(\mathrm{NH}_{4}ight)_{2} \mathrm{SO}_{4} \leftrightharpoons 2 \mathrm{NH}_{4}^{+}+\mathrm{SO}_{4}^{2-}
$$
At anode : $2 \mathrm{SO}_{4}^{2-} \stackrel{\text { Electrolysis }}{ightarrow} \mathrm{S}_{2} \mathrm{O}_{8}^{2-}+2 \mathrm{e}^{-}$
Peroxo sulphate on hydrolysis, produces $\mathrm{H}_{2} \mathrm{O}_{2}$. ,

Asked in: JEE-TOPICTESTS-CHEMISTRY

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