Multiple choice

The chief constituent of gobar gas is

  1. carbon dioxide

  2. methane

  3. acetylene

  4. lungs
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gobar gas (biogas) primarily consists of methane (50-75%), which is produced by anaerobic decomposition of organic matter like cattle dung. Carbon dioxide makes up most of the remainder. The other options are incorrect - acetylene is a different hydrocarbon and lungs are organs.

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