A layer of coke is spread over bayzite during extraction of aluminium. This acts as an ____________.
A
flux
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B
slag to remove impurities
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C
reducing agent
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D
insulation and does not allow heat to escape
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Solution
The correct option is D insulation and does not allow heat to escape
A layer of powdered coke is spread over bauxite (molten electrolyte) during extraction of aluminium. This acts as an insulation and does not allow heat to escape and prevents oxidation.