Question

44. What types of ores are subjected to roasting and what types are subjected to calcination ?
Ans. Sulphide ores are subjected to roasting while carbonate and oxides ores are subjected to calcination.
45. Name the reducing agent in the following chemical reaction :
3 MnO2 +4 Al - 3 Mn +2 Al2O3​

Answer 1

Answer:

Aluminium

Explanation:

Here,AL(aluminium) is the reducing agent .

Al is more reactive than Mn because Al reduces Oxygen from Mn and also Al stands fifth on the reactivity series.