Question

1) In non polar molecules, centre of gravity of positive nuclei and

centre of gravity of negative revolving electrons are

a) coincide with each other b) do not coincide with each other

c) out of the atom d) cannot be defined

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Answer 1

Answer:

The molecules in which the "centre of gravity" of nucleus does not coincide with the centre of gravity of revolving electrons since they have a permanent dipole moment.

eg. H

O

,N

2

O etc are polar molecules

The molecule in which the centre of gravity of molecule coincide with elections are known as non-polar molecules they don't have permanent dipole moment

e.g. H

2

,N

2

etc.