Question
What is meant by heteroatom? Give examples.

Answer

In a hydrocarbon chain, the element replacing hydrogen is referred to as a heteroatom.
In a hydrocarbon chain, hydrogen atom/s can be replaced by heteroatoms, such that the valency of carbon remain satisfied.
Examples :
(1) Halogens like chlorine, bromine.
(2) Oxygen, nitrogen and sulphur elements.

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