Module 1 Revision

Which type of molecule is symmetrical and has no net dipole moment?

• Polar molecule

• London dispersion molecule

• Non-polar molecule

• Hydrogen bonding molecule

Which of the following is a non-polar molecule?

• HCl

• CO₂

• NH₃

• CH₃OH

Which of the following is a polar molecule?

• CH₄

• H₂O

• CO₂

• CCl₄

Which force is responsible for the interaction between non-polar molecules?

• London dispersion

• Permanent dipole - permanent dipole

• Hydrogen bonding

• Ionic bonding

Which of the following is an example of a molecule that exhibits hydrogen bonding?

• HCl

• CH₃OH

• H₂

• NH₄⁺

What is the most important factor determining whether a bond is polar or non-polar?

• The electronegativity difference between the atoms in the molecule

• The number of electrons in the molecule

• The molecular weight of the molecule

• The boiling point of the molecule

Which of the following is an example of a non-polar molecule with dispersion forces?

• H₂O

• NH₃

• CO₂

• HCl

Which of the following is a characteristic of dispersion forces?

• They occur between molecules with permanent dipole moments

• They are only present in polar molecules.

• They increase with increasing molecular weight

• They are stronger than hydrogen bonding.

Which of the following is a characteristic of hydrogen bonding?

• It occurs between molecules with permanent dipole - permanent dipoles

• It is stronger than dispersion forces.

• It is only present in non-polar molecules.

• It decreases with increasing molecular weight.

Rank the following molecules in order of increasing boiling point based on the types of intermolecular forces present

• Xe

• Ar

• Kr

• Ne