Question

Plz answer as soon as possible

Answer 1

If a compound is trans as well as symmetric, then its dipole moment becomes zero, that is, it does not show dipole moment.

So, 3 and 4 do not show dipole moment.

Also, 1,4 di chloro Benzene doesn't show dipole moment because the two chlorine atoms that are exactly opposite to each other cancel out each other.

Thus 1,2-dichloro Benzene is the only one that shows dipole moment among the above ones.

Please refer the pic further.(Dipole moment is denoted by 'μ')

Hope it helps!!