Question

Useful substances obtained from petroleum & natural gases are called​

Answer 1

Many useful substances are obtained from petroleum and natural gas. These are termed as 'Petrochemicals'. These are used in the manufacture of detergents, fibres (polyester, nylon, acrylic etc.), polythene and other man-made plastics. Due to its great commercial importance, petroleum is also called 'black gold'.

Answer 2

Answer:

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