Question

1. Consider a pure sample of CH₃CONH₂ molecules. Which of the following intermolecular forces are present in this sample? Check ALL that apply.

A) Dipole-Dipole Forces (not including Hydrogen Bonding)
B) Induced Dipole-Induced Dipole (London Dispersion) Forces
C) Hydrogen Bonding
D) Induced Dipole-Dipole Forces

2. Consider a pure sample of IO₂F₃ molecules. Which of the following intermolecular forces are present in this sample? Check ALL that apply.

A) Dipole-Dipole Forces (not including Hydrogen Bonding)
B) Induced Dipole-Induced Dipole (London Dispersion) Forces
C) Hydrogen Bonding
D) Induced Dipole-Dipole Forces

Answer 1

van der Waal's forces(dispersion forces) are universal in nature in the sense that they are always present between two molecules irrespective of other kinds of forces.

Also, van der Waal's forces are cumulative in nature. This means that two molecules having dipole-dipole forces also interact via dispersion forces. And molecules having H bonding also attract each other through dipole-dipole forces and dispersion forces.