Choose the correct options for the following questions.
Natural gas mainly contains:
Difficulty: Easy
A:
Methane
B:
Ethane
C:
Ethene
D:
Propane
Mineral oil is called:
Difficulty: Hard
A:
Petroleum
B:
Natural gas
C:
Coal
D:
Diesel oil
Petroleum obtained from rocks as blackish color is:
Difficulty: Hard
A:
Crude mixture
B:
Coke
C:
Crude oil
D:
Coal tar
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