Multiple choice

Biogas contains

  1. methane

  2. ethane

  3. butane

  4. propane
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A Correct answer
Explanation

Biogas primarily contains methane (50-75%), along with carbon dioxide and traces of other gases. Methane is the main combustible component that makes biogas useful as a fuel. Ethane, butane, and propane are higher hydrocarbons not typically found in significant amounts in biogas.

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