Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 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
The ore is heated in the absence of air