Choose the INCORRECT statement from the following.
Last updated Jun 23, 2026
Correct Answer:
Option A —
The main constituent of bio-gas is ethane
The main constituent of bio-gas is actually Methane , which typically makes up 50% to 75% of the mixture. Ethane is usually found in natural gas but is not the primary component of bio-gas .Analysis of the StatementsStatement A (INCORRECT): Bio-gas is primarily Methane and Carbon Dioxide with small traces of Hydrogen Sulfide and moisture.
Statement B (CORRECT): "Gober-gas" (cow dung gas) is produced through anaerobic digestion—the breakdown of organic matter by bacteria in the absence of oxygen. Shutterstock
Statement C (CORRECT): Bio-mass is considered renewable because the organic materials (plants, wood, waste) can be regrown or replenished in a relatively short timeframe.
Statement D (CORRECT): Afforestation (planting trees) is a standard environmental practice to sequester carbon dioxide and release oxygen, leading to a cleaner environment.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
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