Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Periodic Table
It is possible to obtain oxygen from air by fractional distillation because:
1
Oxygen is in a different group of the periodic table from nitrogen
2
Oxygen is more reactive than nitrogen
3
Oxygen has higher b.p than nitrogen
4
More than one of the above
5
None of the above