CNG used in automobiles to check pollution, mainly consists of

Solution (By Examveda Team)

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.