Q. Which one of the following statements is false?
A) During roasting, moisture is removed from the ore.
B) The ore is freed from almost all nonmetallic impurities.
C) Calcination of ore is carried out in the absence of any blast of air.
D) The concentrated zince blend is subjected to calcination during its extraction by pyrometallurgy.
Explanation
(b)
The nonmetallic impurities such as mica, earth particles etc associated with ore. These impurities are known as gangue.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.