Question

Rank the intermolecular forces in the following from strongest to weakest
H2, Ar, HCl, NH3, NaCl

Answer 1

Answer:

Ar

Explanation:

(a) In HCl,HBr and HI dipole-dipole and London forces are present but in HF besides these, intermolecular hydrogen bonding is also present.

(b) Electronegtativity decreases from Cl to I so, dipole moment decreases from HCl to HI. As the boiling point is increasing from HCl to HI, it means London forces are predominant.

London force is directly proportional to the number of electrons in a molecule.

(c) HF has the highest electronegativity, as a result, has highest dipole moment and also has hydrogen bonding therefore, HF shows the highest boiling point.