Chemistry
For each of the substances given below, what is the role played in extraction of ZnO and Al respectively.
(a) Coke
(b) Cryolite
Metallurgy
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Answer
(a) Coke (C) is used as a reducing agent in the extraction of zinc from zinc oxide.
(b) Addition of Cryolite during the extraction of Al lowers the fusion temperature from 2050°C to 950°C and enhances conductivity.
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