CNG used in automobiles to check pollution, mainly consists of
A
CH<sub>4</sub>
B
CO<sub>2</sub>
C
N<sub>2</sub>
D
H<sub>2</sub>
Correct Answer: CH<sub>4</sub>
Nature gas is 95 percent Methane (CH4) plus four other hydrocarbons:Ethane (C2H6) - 2.5 %, Propane (C3H8) - 0.2 %, Butane (C4H10) - 0.06%, Pentanes Plus (C5H12 + C10H22) -0.02%. It also contains small amounts of: Nitrogen (N2) - 1.6%, Carbon Dixoide (CO2) - 0.7%, Hydrogen Sulphide (H2S) - trace, Water (H2O) - trace.
