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Question

Explain the following.

(i) Methane is called marsh gas.

(ii) Petrol and diesel are fossil fuels.


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Solution

(i)

  • Methane is formed by the decomposition of plant and animal matter in swamps or marshy areas.

  • As methane gas bubbles out from the marshy area, it is called marsh gas.

(ii)

  • Petrol and diesel are obtained from mineral oil. Mineral oil also called crude oil or petroleum oil is formed from the remains of plants and animals that lived in the seas millions of years ago. This plant and animal matter has been drawn down and subjected to extremes of temperature and pressure over millions of years ago.

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