Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry Periodic Table
The process employed for the concentration of sulphide ore is
1
Froth Floatation
2
Roasting
3
Electrolysis
4
More than one of the above
5
None of the above