Purification And Characterisation Of Organic Compounds Question 123
Question: Heating of ore in presence of air to remove sulphur impurities is called
[AFMC 2005]
Options:
A) Calcination
B) Roasting
C) Smelting
D) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
Roasting involves heating of the ore either alone or with some other material usually in presence of air below its fusion temperature.
In roasting, definite chemical changes like oxidation, chlorination etc., take place $ S+O_2\to SO_2 $
BETA
