Which of the following molecules is(are) polar ?
I. BF₃ (trigonal planar)
II. NH₃ (trigonal pyramidal)
III. BF₂Cl (trigonal planar)

Question

Which of the following molecules is(are) polar ? I. BF₃ (trigonal planar) II. NH₃ (trigonal pyramidal) III. BF₂Cl (trigonal planar)

Quizplus · Accepted Answer

Molecules I and III have a symmetric arrangement of atoms around the central atom, resulting in a nonpolar molecule. However, molecule II has a lone pair of electrons on the central atom, making it an asymmetric molecule and thus polar. Therefore, the correct choice is D, as it includes molecules II and III, which are polar.

Which of the Following Molecules Is(are) Polar