Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Basic Concepts of Chemistry
One of the following statements is true for the process of Roasting carried out during the extraction of metals from their ores. Identify the true statement.
1
Roasting is used for Carbonate ores.
2
Roasting is not used for Sulphide ores.
3
The ore is heated in the presence of air.
4
More than one of the above
5
None of the above