MolSynapsequestion bank
MolSynapse / Question bank / Metallurgy / Refining methods: zone refining, van Arkel, Mond process, electrolytic refining
JEE Main levelSingle correct optionDifficulty 2 of 3mt180

In the Hoope's three-layer electrolytic process for aluminium, the top layer consists of

  1. Apure molten aluminium, which acts as the cathode
  2. Bsolid pure aluminium
  3. Cmolten cryolite only
  4. Dimpure aluminium-copper alloy, which is the anode

Answer: A

The bottom layer is impure Al-Cu alloy (anode, densest). The middle layer is a molten fluoride electrolyte. Pure Al is least dense, floats on top and serves as the cathode layer.
Practice Metallurgy More on Refining methods: zone refining, van Arkel, Mond process, electrolytic refining
Previous questionNext question

More questions on Refining methods: zone refining, van Arkel, Mond process, electrolytic refining