Question

Decide which intermolecular forces act between the molecules of each compound in the table below. intermolecular forces (check all that apply) compound dispersion dipole hydrogen-bonding carbon monoxide Cl2 chlorine HBrO hypobromous acid NOC nitrosyl chloride

Answer 1

Compound	dispersion	dipole	hydrogen-bonding
carbon monoxide (CO)	Y	Y	N
Cl2  chlorine	Y	N	N
HBrO (hypobromous acid)	Y	Y	Y
NOCl (nitrosyl chloride)	Y	Y	N

* Y denotes Yes(Intermolecular force present) *N denotes Nil( Intermolecular force absent)

Dispersion Forces or London Forces

Atoms and nonpolar molecules are electrically symmetrical and have no dipole moment because their electronic charge cloud is symmetrically distributed. But a temporary dipole is created by the fluctuation in electronic arrangement in a molecule. Hence all molecules must show dispersion force.

Dipole forces

It can be dipole-dipole or dipole-induced dipole forces. Here a partial positive or partial negative charge is created on the atoms in a molecule due to its  electronegativity difference. A polar molecule can induce a dipole on non polar molecule also.

Hydrogen bonding

It is a special case of dipole-dipole interaction. This is found in the molecules in which highly polar N-H, O-H or H-F bonds are present.