In each pair, which would you expect to have the higher melting point?
(b)

Intermolecular forces are the attractive forces between molecules that influence physical properties like melting and boiling points. Stronger intermolecular forces, such as hydrogen bonding or ionic interactions, typically result in higher melting points. Understanding the types of intermolecular forces present in the compounds being compared is crucial for predicting their melting points.

The molecular structure, including the arrangement of atoms and the presence of functional groups, significantly affects a compound's melting point. For example, symmetrical molecules may pack more efficiently in a solid state, leading to higher melting points. Analyzing the structural features of the compounds in question helps in determining which one is likely to have a higher melting point.

Polarity refers to the distribution of electrical charge over the atoms in a molecule. Polar molecules tend to have stronger dipole-dipole interactions compared to nonpolar molecules, which primarily experience weaker London dispersion forces. The polarity of the compounds being compared can provide insight into their melting points, as polar compounds generally exhibit higher melting points due to stronger intermolecular attractions.