Increasing order of dipole moment of following compounds

Question

Increasing order of dipole moment of following compounds (A) (iv)< (i)< (ii)< (iii) (B) (i) < (iv) < (iii)<(ii) (C) (iv) < (iii)< (ii)< (i) (D) (iii) < (iv)< (ii)< (i)

Tardigrade Admin · Accepted Answer

Dipole moment is a quantity that describes two opposite charges separated by a distance. It is quantity that we can measure for a molecule in lab and thereby determine the size of partial charges on the molecule.
Among the given species, more closer the groups attached to the ring

\to

show more dipole-moments then the species that has no second group attached to the ring. Hence, increasing order of dipole moment is

(i v) < (i) < (ii) < (iii)

Q. Increasing order of dipole moment of following compounds

(iv)< (i)< (ii)< (iii)

(i) < (iv) < (iii)<(ii)

(iv) < (iii)< (ii)< (i)

(iii) < (iv)< (ii)< (i)