Which of the following statements are correct? A. A depressant pr… - Vidyadip

MCQ

Which of the following statements are correct?
$A.$ A depressant prevents certain type of particle to come to the froth.
$B.$ Copper matte contains $\mathrm{Cu}_2 \mathrm{S}$ and $\text{ZnS}.$
$C.$ The solidified copper obtained from reverberatory furnace has blistered appearance due to evolution of $\mathrm{SO}_2$ during the extraction.
$D.$ Zinc can be extracted by self $-$ reduction.

A
$B$ and $C$
B
$A$ and $B$
✓
$A$ and $C$
D
$C$ and $D$

✓

Answer

Correct option: C.

$A$ and $C$

Depressants can prevent frothing of a particular sulphide. The solidified copper obtained in reverberatory furnace has blistered appearance hence it is called blister copper.

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