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The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is:

1. Cryolite
2. Bauxite
3. Calamine
4. Kaolinite

Correct answer: Cryolite

Solution

Cryolite is added to the extraction process of aluminum to lower the melting point of the alumina, making the electrolysis process more efficient and energy-saving.

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