Q. Auto-reduction process is used in the extraction of
A) Cu and Hg
B) Zn and Hg
C) Cu and Al
D) Fe and Pb
Explanation
(a)
$2HgS + 3O_{2} \rightarrow 2HgO + 3SO_{2}$
$2HgO\overset{\mathrm{\Delta}}{\rightarrow}2Hg + O_{2}$
$2Cu_{2}S + 3O_{2} \rightarrow 2Cu_{2}O + 2SO_{2}$
$2Cu_{2}O + Cu_{2}S \rightarrow 6Cu + SO_{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.