Hydrogen peroxide is obtained by the electrolysis of __________.
A.
water
B.
sulphuric acid
C.
hydrochloric acid
D.
fused sodium peroxide
Answer :
sulphuric acid
Solution :
$${H_2}{O_2}$$ is obtained by the electrolysis of a cold 50% solution of $${H_2}S{O_4}.$$
$$2{H_2}S{O_4} \to 2{H^ + } + 2HSO_4^ - $$
\[\underset{\,\,\,\,\,\,\,\,2HSO_{4\left( aq \right)}^{-}+2H_{\left( aq \right)}^{+}+{{H}_{2}}{{O}_{2\left( aq \right)}}}{\mathop{2HSO_{4}^{-}\xrightarrow{\text{Electrolysis}}\underset{\begin{smallmatrix}
\text{Peroxodisulphate} \\
\downarrow \,\text{Hydrolysis}
\end{smallmatrix}}{\mathop{H{{O}_{3}}SOOS{{O}_{3}}{{H}_{\left( aq \right)}}}}\,}}\,\]
Releted MCQ Question on Inorganic Chemistry >> Hydrogen
Releted Question 1
$$HCl$$ is added to following oxides. Which one would give $${H_2}{O_2}$$ ?