question_answer 53)

  Hydrogen peroxide is obtained by the electrolysis of : (a) water                             (b) sulphuric acid              (c) hydrochloric acid        (d) fused sodium peroxide

Answer:

(b) \[{{H}_{2}}S{{O}_{4}}\underset{{}}{\leftrightarrows}{{H}^{+}}+HSO_{4}^{-}\]                                        Anode                                                 \[HS{{O}_{4}}+{{e}^{-}}\] \[2{{H}_{2}}{{S}_{2}}{{O}_{8}}+2{{H}_{2}}O\to 2{{H}_{2}}S{{O}_{4}}+{{H}_{2}}{{O}_{2}}\]