Question
Write the importance of petrochemicals.
✓
Answer
Importance of petrochemicals are:
$i.$ They are used for the production of plastics, fibres, detergents etc.
$ii.$ They are used in the manufacture of ammonia and methanol.
$iii.$ They are considered as the important source for the production of chemicals which are used in industries.
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$3.$ Protruding voice box in boys.
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