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Q94 (CDS-II/2006) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Organic chemistry basics Answer Verified

What is the chemical formula for Marsh gas?

Result
Your answer: —  Â·  Correct: B
Explanation

Marsh gas is the common name for methane, which has the chemical formula CH4. It is the simplest alkane, consisting of one carbon atom bonded to four hydrogen atoms [2]. Methane is primarily produced in nature through the anaerobic decomposition of organic matter in wetlands and marshes, hence its name 'marsh gas' [4]. It is a major component of natural gas, biogas, and Compressed Natural Gas (CNG) [3]. While other options like ethane (C2H6) and ammonia (NH3) are also carbon or nitrogen-based compounds, they do not constitute marsh gas [2]. Carbon dioxide (CO2) and nitrogen dioxide (NO2) are atmospheric gases but are distinct from the flammable hydrocarbon methane [3]. Methane is a significant greenhouse gas and is widely used as a fuel source globally [4].

Sources

  1. [1] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > 4.1 BONDING IN CARBON – THE COVALENT BOND > p. 60
  2. [2] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > 4.2.2 Chains, Branches and Rings > p. 64
  3. [4] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 17: Climate Change > 17,3.3. Methane > p. 256
  4. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 20: Earths Atmosphere > Permanent Gases of The Atmosphere > p. 271
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