Question

Which of the following is not correctly matched with respect to the inter molecular or ces existing amongst the molecules (Hydrogen bonding is not taken as dipole-dipole attraction) ?

(A) Benzene – London dispresion forces

(B) Orthophosphoric acid – London dispresion force, hydrogen bonding.

(C) Hydrochloric acid – London dispresion force, dipole-dipole attraction

(D) Iodine monochloride – London dispersion force

Answer 1

Correct Answer is: (D) Iodine monochloride – London dispersion force

All molecules have London dispersion force because of number of polarizable electrons. Non polar molecules have only London dispersion force because of polarisable electron. Benzene is non polar molecule. Polar molecules have dipole-dipole attraction in addition to London dispersion force.

Molecules with, O–H, N–H, or F – H bond have hydrogen bonding in addition to London dispersion force.

Molecule ICl is polar, so in addition to London dispersion force it has dipole-dipole attraction also.