Multiple choice

By which of the following process purification of Al is done?

  1. Hoop’s process

  2. Wet process

  3. Van-Arkel process

  4. Mond process

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct, because this process is for electrolytic refining of Al. The electrolytic cell consists of three liquid layers of different gravities. The top layer of pure Al acts as cathode. The bottom layer; molten impure Al acts as anode. The middle layer is fused cryolite and barium fluoride. It acts as an electrolyte. When current flows, Al ions from the middle layer are discharged at the cathode.

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