Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry Chemical Reaction
Calcination is the process of metallurgy which is done basically ____________
1
For concentration of ore
2
For converting carbonate ore to oxide ore
3
For reducing oxide ore to metal
4
More than one of the above
5
None of the above