In the extraction of Aluminium (Hall-Heroult process), cryolite is added to alumina to: MCQ Questions & Answers | All Govt Exams Practice

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📝 Multiple Choice Question General-science

In the extraction of Aluminium (Hall-Heroult process), cryolite is added to alumina to:

A increase the melting point

B lower the melting point and increase conductivity

C act as an oxidizing agent

D remove impurities of iron

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