Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Hydrocarbons
Crude petroleum oil is refined by a process known as
1
Destructive distillation
2
Fractional distillation
3
Evaporation
4
More than one of the above.
5
None of the above