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Gobar gas contains mainly

1. CH4 + CO2
2. CH4 + H2
3. CO2 + H2
4. CO2 + SO2

Correct answer: CH4 + CO2

Solution

Gobar gas is biogas formed by anaerobic digestion of organic waste, especially cattle dung. Its major components are methane and carbon dioxide, with methane providing the fuel value.

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