Which of the following statements regarding biogas are incorrect?

Utilises domestic waste

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Minimal air pollution

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Low calorific value

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Main constituent is ethane

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Solution

The correct option is D
Main constituent is ethane

Biogas is formed by the action of bacteria on biowaste like agricultural waste, sewage, plant matter, etc., in the absence of oxygen.

Biogas is a fuel of high calorific value and has methane $(C H_{4})$ as its main constituent.
It is a non-polluting fuel as it produces very minimal air pollution when burnt.

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