Question 13

Hydrogen peroxide is obtained by the electrolysis of .......

(a) water (b) sulphuric acid

(c) hydrochloric acid (d) fused sodium peroxide

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Solution

(b)

Peroxodisulphate, obtained by electrolytic oxidation of acidified sulphate solutions at high current density , on hydrolysis yield hydrogen peroxide.

$2 H S O_{4}^{-} (a q) E l e c t r o l y s i s - ------ \to H O_{3} S O O S O_{3} H (a q) H y d r o l y s i s - ----- \to 2 H S O_{4}^{-} (a q) + 2 H^{+} (a q) + H_{2} O_{2} (a q)$

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Question 12

When sodium peroxide is treated with dilute sulphuric acid, we get .....

(a) sodium sulphate and water

(b) sodium sulphate and oxygen

(d) sodium sulphate and hydrogen peroxide

Q. Hydrogen peroxide is obtained by the electrolysis of:

Question 12.
One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is
(a) hydrochloric acid
(b) tartaric acid
(c) acetic acid
(d) sulphuric acid

Question 12.
One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is
(a) hydrochloric acid
(b) tartaric acid
(c) acetic acid
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Q. When sodium peroxide is treated with dilute sulphuric acid _________

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Question 13 Hydrogen peroxide is obtained by the electrolysis of ....... (a) water (b) sulphuric acid (c) hydrochloric acid (d) fused sodium peroxide

(b) Peroxodisulphate, obtained by electrolytic oxidation of acidified sulphate solutions at high current density , on hydrolysis yield hydrogen peroxide. 2HSO−4(aq)Electrolysis−−−−−−−→HO3SOOSO3H(aq)Hydrolysis−−−−−−→2HSO−4(aq)+2H+(aq)+H2O2(aq)

Question 13

Hydrogen peroxide is obtained by the electrolysis of .......

(a) water (b) sulphuric acid

(c) hydrochloric acid (d) fused sodium peroxide