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Given below are two statements : Statement I : During Electrolytic refining, the pure metal is made to act as anode and its impure metallic form is used as cathode. Statement II : During the Hall-Heroult electrolysis process, purified Al2O3 is mixed with Na3AlF6 to lower the melting point of the mixture. In the light of the above statement, choose the most appropriate answer from the options given below :

1. Both Statement I and Statement II are incorrect
2. Both Statement I and Statement II are correct
3. Statement I is incorrect but Statement II is correct
4. Statement I is correct but Statement II is incorrect

Correct answer: Statement I is incorrect but Statement II is correct

Solution

Statement I is incorrect because, in electrolytic refining, the impure metal acts as the anode and the pure metal is deposited at the cathode. Statement II is correct as the addition of Na3AlF6 to Al2O3 helps to reduce the melting point, facilitating the electrolysis process.

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