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Question
Which of these metals is not extracted by using coke as a reducing agent?
Which of these metals is not extracted by using coke as a reducing agent?
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Solution
The correct option is B Al
we use coke, because we want the carbon in the coal, but we don’t want the volatiles.
Oxides of strong electropositive metals such as Co, Al and Fe are very stable. It is difficult to reduce them into the metallic state by carbon reduction. Such metals are extracted by passing electricity through their fused chlorides/oxides/hydroxides. As aluminum is not used as reducing agent for its extraction.
Hence , option B is correct .
we use coke, because we want the carbon in the coal, but we don’t want the volatiles.
Oxides of strong electropositive metals such as Co, Al and Fe are very stable. It is difficult to reduce them into the metallic state by carbon reduction. Such metals are extracted by passing electricity through their fused chlorides/oxides/hydroxides. As aluminum is not used as reducing agent for its extraction.
Hence , option B is correct .
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