Which one of the following statements is correct for electrolysis of brine solution? [2023]

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Solution

Q.
Which one of the following statements is correct for electrolysis of brine solution [2023]

1 ${OH}^{-}$ is formed at cathode

2 ${Cl}_{2}$ is formed at cathode

3 $O_{2}$ is formed at cathode

4 $H_{2}$ is formed at anode

Ans.
(1)

$Brine solution – NaCl(aq)$

$At Cathode: H_{2} O (l) + e^{-} \to \frac{1}{2} H_{2} (g) + {OH}^{-} (aq)$

$At Anode: {Cl}^{-} (aq) \to \frac{1}{2} {Cl}_{2} (g) + e^{-}$

Solution

Q. Which one of the following statements is correct for electrolysis of brine solution [2023]

1 OH- is formed at cathode

2 Cl2 is formed at cathode

3 O2 is formed at cathode

4 H2 is formed at anode

Ans. (1) Brine solution – NaCl(aq) At Cathode: H2O(l)+e-→12H2(g)+OH-(aq) At Anode: Cl-(aq)→12Cl2(g)+e-

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Q.
Which one of the following statements is correct for electrolysis of brine solution [2023]

1 ${OH}^{-}$ is formed at cathode

2 ${Cl}_{2}$ is formed at cathode

3 $O_{2}$ is formed at cathode

4 $H_{2}$ is formed at anode

Ans.
(1)

$Brine solution – NaCl(aq)$

$At Cathode: H_{2} O (l) + e^{-} \to \frac{1}{2} H_{2} (g) + {OH}^{-} (aq)$

$At Anode: {Cl}^{-} (aq) \to \frac{1}{2} {Cl}_{2} (g) + e^{-}$