COMEDK · Chemistry · 18. Electrochemistry
Two statements, one Assertion and the other Reason, are given. Choose the correct option.
Assertion: During the electrolysis of aqueous \(\mathrm{NaCl}, \mathrm{Cl}_2\) is liberated at the anode in preference to \(\mathrm{O}_2\) and water gets reduced to \(\mathrm{H}_2\) at cathode.
Reason: The reaction at Anode with lower oxidation potential is not preferred due to over potential of Oxygen.
- A Assertion is incorrect but Reason is correct.
- B Assertion is correct but Reason is incorrect.
- C Both Assertion and Reason are correct.
- D Both Assertion and Reason are incorrect.
Answer & Solution
Correct Answer
(C) Both Assertion and Reason are correct.
Step-by-step Solution
Detailed explanation
In the electrolysis of aqueous \(\mathrm{NaCl}\), the competing reactions at the anode are: 1. \(2\mathrm{Cl}^{-}(aq) \rightarrow \mathrm{Cl}_2(g) + 2e^{-}\), \(E^{\circ} = 1.36 \mathrm{V}\) 2.…
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