Polar and Non-polar Covalent Bonds — Prelims Questions

Which of the following molecules is non-polar despite having polar covalent bonds?

Which of the following pairs of molecules has the same molecular geometry but different molecular polarities?

Which of the following statements about dipole moment is INCORRECT?

Arrange the following bonds in increasing order of polarity: C-H, O-H, F-H, N-H. (Given electronegativity values: H=2.20, C=2.55, N=3.04, O=3.44, F=3.98)

Which of the following molecules would you expect to have the highest boiling point?

Which of the following molecules has a net dipole moment of zero?