Q. Extraction for zinc from zinc blende is achived by
A) Electrolytic reduction
B) Roasting following by reduction with carbon
C) Roasting followed by reduction with another metal
D) Roasting followed by self-reduction
Explanation
(b)
Zinc blende is roasted and then treated with coke for the reduction
$3ZnS + 3O_{0}\ \overset{\ \ \ \mathrm{\Delta}\ \ \ \ }{\rightarrow}2ZnO + 2SO_{2} \uparrow$
$ZnO + C\ \overset{\ \ \mathrm{\Delta}\ \ \ \ }{\rightarrow}Zn + CO \uparrow$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.