Which among the following elements are present in polythene?

Hydrogen

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Oxygen

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Nitrogen

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Carbon

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Solution

The correct options are
A
Hydrogen

D
Carbon

Ethene consists of only carbon and hydrogen. Its molecular formula is $C_{2} H_{4}$ . Polythene is the polymer of ethene i.e., polythene consists of $n$ number of ethene molecules.

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In human body which element is most abundant by weight and by number respectively?

a) carbon, hydrogen

b) oxygen, hydrogen

c) oxygen, carbon

d) carbon, nitrogen

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