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  • Which of the following statements are correct? (i) A depressant prevents a certain type of particle to come to the froth. (ii) Copper matte contains {Cu}_{2} {S} and {ZnS}

Which of the following statements are correct?

(i) A depressant prevents a certain type of particle to come to the froth.

(ii) Copper matte contains \text {Cu}_{2}\text {S} and \text {ZnS}

(iii) The solidified copper obtained from the reverberatory furnace has blistered appearance due to evolution of \text {SO}_{2} during the extraction.

(iv) Zinc can be extracted by self-reduction.

Answers (1)

The answer is the option (i, iii). Frothing of a particular sulphide can be prevented by depressants. The solidified copper that we get in reverberatory furnace has blistered appearance due to evolution of \text {SO}_{2} during extraction. Hence, it is called blister copper.

 

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