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NDA 2021 GAT · General Knowledge · Carbon and Organic Chemistry · easy

The chief constituent of compressed natural gas (CNG) is

Single correct option

The chief constituent of compressed natural gas (CNG) is
  1. A. butane
  2. B. propane
  3. C. ethyne
  4. D. methane
Show answer and solution

Answer: (D) methane

CNG is mainly methane (typically above 85 percent). Butane and propane are the main components of LPG. Ethyne (acetylene) is used in welding. CNG burns cleaner than petrol or diesel, so it is used as a vehicle fuel.
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Original question written in the NDA 2021 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake