Q. Which is statement is incorrect?
A) Galena is an ore of Pb
B) Electrostatic separation is used for lead sulphide
C) Ore is heated strongly, above its melting point in roasting
D) Silica acts as acidic flux
Explanation
(c)
Roasting is the process in which the ore is heated strongly below its melting point is presence of air
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.