Question: Which Gas Is Mainly present in CNG?
A. Methane
B. Butane
C. Propane
D. Ethane
Answer: Option A
The main gas in CNG (Compressed Natural Gas) is Methane (CH₄). Methane makes up more than 90% of the total CNG composition It makes it the most dominant and essential component. Methane in CNG burns more completely and cleanly than other fossil fuels due to its simple chemical structure.
This is why CNG gas is widely used in vehicles as a clean fuel gas. As a fuel, it is also safer because methane is lighter than air and disperses quickly in case of a leak. Candidates must understand which gas is in CNG as it is important for exams that test general science awareness.
Properties of CNG
The following are the CNG properties candidates preparing for competitive exams must know:
-
CNG full form is Compressed Natural Gas, and it primarily contains methane.
-
It is a clean fuel gas. It produces fewer harmful emissions than petrol or diesel.
-
CNG fuel components burn efficiently. It results in lower levels of carbon monoxide and hydrocarbons.
-
CNG gas is considered a safe fuel due to its high ignition temperature and narrow flammability range.
-
It is lighter than air, so in the event of a leak, it disperses quickly, minimizing fire hazards.
-
CNG properties include high calorific value, low environmental impact, and economic efficiency.
-
It is commonly used in CNG gas vehicles like buses, taxis, and auto-rickshaws in urban transport systems.
