Question

Identify the strongest intermolecular force in each of the following pure substances:

CH2CL2

CO2

CH3-O-CH3

HF

Answer 1

For

Dipole-dipole interaction is greater than vanderwaal forces and greater than dipole induced dipole. Thus, Dipole-dipole interaction are present as Intermolecular forces in due to the presence of electronegativity difference between the carbon and chlorine molecule. Appearance of partial positive charge occur on carbon and partial negative on chlorine and thus dipole-dipole interaction are present in them.

For

Gases having lowest interaction between their molecule and therefore their molecule are far apart to interact. Carbon dioxide is a gas and weak interaction such as weak dispersion forces of interaction are present as Intermolecular forces in

For

Ether usually forms weak interaction between their molecule and therefore they are having lower boiling point. They are volatile and thus Vanderwaal forces of interaction are present as Intermolecular forces in

For

Hydrogen of HF forms bonding with the fluoride of other HF molecule to form the strongest interaction. Thus, Hydrogen bonding interaction are present as Intermolecular forces in