Question

(a) Write the principle of electrolytic refining.
(b) Why does copper obtained in the extraction from copper pyrites have a blistered appearance?
(c) What is the role of depressants in the froth floatation process?

Answer 1

(a) It is made on the phenomena of electrolysis.
(b) The solidified copper obtained has blistered appearance due to the evolution of $S{O}_2$ and it is also called blister copper.
(c) Depressants are used to separate two sulphides by adjusting the proportion of oil.