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What Do You Mean by Polar Molecules and Non-polar Molecules? Give ‘One’ Example Each. - Physics

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Question

What do you mean by polar molecules and non-polar molecules? Give ‘one’ example each.

Solution

Polar molecules: The molecules in which “centre of gravity” of positive nuclei and revolving electrons do not coincide are known as polar molecules.

Example: HCl, H2O, N2O etc.

Polar substances behave as a tiny electric dipole because polar molecules have a permanent electric dipole moment.

Non-polar molecules: The molecules in which “centre of gravity” of positive nuclei and revolving electrons coincide are known as non-polar molecules.

Example: O2, H2, CO2, polyethelene, polystyrene etc.

Non-polar molecules do not have permanent electric dipole moment because of their
symmetry.

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APPEARS IN

 2012-2013 (October) (with solutions)
Question 7.3 | 2.00 marks
Solution What Do You Mean by Polar Molecules and Non-polar Molecules? Give ‘One’ Example Each. Concept: Atomic Masses and Composition of Nucleus.
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