Free VSEPR Theory MCQs with Answers
11 VSEPR Theory MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
11 questions · page 2 of 2
11. Molecules having one lone pair and three bond pairs have geometrical shape
- A. Bent or angular
- B. Trigonal
- C. Trigonal pyramidal
- D. Trigonal planar
Explanation: Four regions of electron density arrange themselves tetrahedrally, but only the three bonded atoms are visible, so the shape is a pyramid, as in ammonia with its bond angle of about 107 degrees. Trigonal planar at 120 degrees would require three bond pairs and no lone pair, as in boron trifluoride, which is the trap here. A bent shape comes from two bond pairs with two lone pairs, as in water.
Correct answer: Trigonal pyramidal