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JEE Main201912 Jan 2019Morning ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of:

Options

  1. APlatinum
  2. BCarbon
  3. CCopper
  4. DPure aluminium

Correct answer

B. Carbon

Step-by-step solution

The electrolytic cell which is used for extraction of aluminium is a steel vessel. The vessel is lined with carbon, which acts as cathode and graphite is used at the anode.

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