Which of the following statements are incorrect ?
(i) Zinc can be extracted by self-reduction.
(ii) A depressant prevents 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 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 :
(i) and (iii)
Solution :
Copper matte consists of $$C{u_2}S$$ and $$FeS.$$
Releted MCQ Question on Inorganic Chemistry >> Ores and Metallurgy