Question
Explain the difference between non-polar and polar atoms or molecules by giving examples.
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Answer
In non-polar atoms or molecules, the centres of distribution of negative and positive charges coincide, due to which the dipole moment remains zero. In polar molecules, there is a gap between the centres of distribution of these charges and the molecule has a permanent dipole moment.
$N _2, CH _4, H _2 O , O _2$ etc. are non-polar whereas $H _2 O$, $NH _3, HCl$ etc. are polar molecules,
$N _2, CH _4, H _2 O , O _2$ etc. are non-polar whereas $H _2 O$, $NH _3, HCl$ etc. are polar molecules,
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