nursing UP CNET BSc Nursing 2025 Mock Test Series Chemistry General Principles And Process of Isolation of Elements
Select the correct statement :
1
Roasting involves heating the ore in the absence of air
2
Calcination involves heating the ore above its melting point
3
Smelting involves heating the ore with suitable reducing agent and flux below it melting point
4
Calcination of calcium carbonate is endothermic