Multiple choice

Gobar gas mainly contains?

  1. Methane

  2. Ethane

  3. Carbon

  4. Nitroflourine

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A Correct answer
Explanation

Gobar gas (biogas) primarily contains methane (50-70%), along with carbon dioxide (30-40%) and trace amounts of hydrogen sulfide. It is produced by anaerobic decomposition of organic matter (cow dung, etc.). Ethane is present in trace quantities only. 'Carbon' and 'Nitroflourine' are incorrect - carbon is not a gas at STP, and 'Nitroflourine' is not a recognized chemical term.

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