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JEE · NEET Previous Year Question

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 is mixed with to lower the melting point of the mixture.
In the light of the above statements, choose the most appropriate answer from the options given below:

Topic: JEE PYQ

Answer: A. Full step-by-step solution below.

  1. AStatement I is incorrect but Statement II is correct
  2. BBoth Statement I and Statement II are incorrect
  3. CStatement I is correct but Statement II is incorrect
  4. DBoth Statement I and Statement II are correct

Correct answer: A

Solution

(a)
In Electrolytic refining, the pure metal is used as cathode and impure metal is used as anode.
is added during electrolysis of to lower the melting point and increase conductivity.

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