Question

Which of the following statements are incorrect?
I. Zinc can be extracted by self-reduction.
II. A depressant prevents a certain type of particles to come to the froth.
III. Copper matte contains $ZnS$ and $C{u}_{2}S$.
Iv. The solidified copper obtained from reverberatory furnace has blistered appearance due to the evolution of $S{O}_2$ during the extraction.

• A. I and II
• B. II and III
• C. I and III
• D. II and IV

Answer 1

The correct option is C I and III

Zinc cannot be extracted by self-reduction process as Zinc Sulphide and oxide cannot react. Copper matte contains ${Cu}_{2}S$ and $FeS$