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Which of the following statements are Incorrect?

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A depresant prevents certain type of particle to come to the froth

Copper matte contains Cu₂S and ZnS

The solidified copper obtained from reverberatory furnace has blistered appearance due to evolution of SO₂ during the extraction.

Cu can be extracted by self-reduction

answer is B.

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Detailed Solution

A depresant prevents certain type of particle like ZnS to come to the froth

Copper matte contains Cu₂S and FeS.

The solidified copper obtained from reverberatory furnace has blistered appearance due to evolution of SO₂ during the extraction.

Self reduction method is used for sulphide ores of less electropositive metals like Pb, Hg, Cu.

Hence, option(B) is incorrect.

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