Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test Chemistry General Principles And Process of Isolation of Elements Metals and Its Ores
Which among the following pairs of ore-metal is incorrect?
1
Bornite - Copper
2
Cinnabar - Nickel
3
Magnetite - Iron
4
More than one of the above
5
None of the above