Assertion : In electrolytic refining, electrolytic cell consists of...

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Assertion : In electrolytic refining, electrolytic cell consists of pure and impure \( \mathrm{Cu} \) electrodes dipped in \( \mathrm{CuSO}_{4}(a q) \).
Reason: Pure \( \mathrm{Cu} \) is obtained at anode.
(1) If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(2) If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.
- (3) If Assertion is true, but the Reason is false.
(4) If both Assertion and Reason are false.
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