Which of the following electrolyte can be used to obtain by the process of electrolysis? [2025]

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Q.
Which of the following electrolyte can be used to obtain $H_{2} S_{2} O_{8}$ by the process of electrolysis [2025]

1 Dilute solution of sodium sulphate

2 Concentrated solution of sulphuric acid

3 Dilute solution of sulphuric acid

4 Acidified dilute solution of sodium sulphate

Ans.
(2)

Reaction at anode with dilute sulphuric acid:

$2 H_{2} O (l) ⟶ O_{2} (g) + 4 H^{+} (a q) + 4 e^{-}$

Reaction at anode with concentrated sulphuric acid:

$2 S O_{4}^{2 -} (a q) ⟶ S_{2} O_{8}^{2 -} (a q) + 2 e^{-}$

Solution

Q.
Which of the following electrolyte can be used to obtain $H_{2} S_{2} O_{8}$ by the process of electrolysis [2025]

1 Dilute solution of sodium sulphate

2 Concentrated solution of sulphuric acid

3 Dilute solution of sulphuric acid

4 Acidified dilute solution of sodium sulphate

Ans.
(2)

Reaction at anode with dilute sulphuric acid:

$2 H_{2} O (l) ⟶ O_{2} (g) + 4 H^{+} (a q) + 4 e^{-}$

Reaction at anode with concentrated sulphuric acid:

$2 S O_{4}^{2 -} (a q) ⟶ S_{2} O_{8}^{2 -} (a q) + 2 e^{-}$

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Solution

Q. Which of the following electrolyte can be used to obtain H2S2O8 by the process of electrolysis [2025]

1 Dilute solution of sodium sulphate

2 Concentrated solution of sulphuric acid

3 Dilute solution of sulphuric acid

4 Acidified dilute solution of sodium sulphate

Ans. (2) Reaction at anode with dilute sulphuric acid: 2H2O(l)⟶O2(g)+4H+(aq)+4e- Reaction at anode with concentrated sulphuric acid: 2SO42-(aq)⟶S2O82-(aq)+2e-

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Q.
Which of the following electrolyte can be used to obtain $H_{2} S_{2} O_{8}$ by the process of electrolysis [2025]

Ans.
(2)

Reaction at anode with dilute sulphuric acid:

$2 H_{2} O (l) ⟶ O_{2} (g) + 4 H^{+} (a q) + 4 e^{-}$

Reaction at anode with concentrated sulphuric acid:

$2 S O_{4}^{2 -} (a q) ⟶ S_{2} O_{8}^{2 -} (a q) + 2 e^{-}$