Question

Dipole-dipole attractions increase in magnitude with:

A) Increasing molecular mass
B) Decreasing molecular mass
C) Increasing bond polarity
D) None of the above

Answer 1

Dipole-dipole attractions increase in magnitude with increasing bond polarity, not necessarily with molecular mass changes.

Step-by-step explanation:

Dipole-dipole attractions increase in magnitude with an increase in molecular polarity. That is, as the polarity of the bond within the molecule increases, the positive and negative ends of the dipole become more pronounced, leading to stronger electrostatic interactions between molecules. Therefore, option A) Increasing molecular mass and B) Decreasing molecular mass are not directly related to the strength of dipole-dipole interactions. Instead, the magnitude of these attractions increases with the polarity of the molecule, as per option C) Increasing bond polarity.