Which of the following molecules has a trigonal-pyramidal shape?A.SeF6B.SO2C.PH3D.BH3
Question
Which of the following molecules has a trigonal-pyramidal shape?
A. SeF<sub>6</sub>
B. SO<sub>2</sub>
C. PH<sub>3</sub>
D. BH<sub>3</sub>
Solution
The molecule with a trigonal-pyramidal shape is C.PH3.
Here's why:
A. SeF6 (Selenium hexafluoride) has an octahedral shape because it has 6 bonding pairs and no lone pairs of electrons.
B. SO2 (Sulfur dioxide) has a bent or V-shape due to its 2 bonding pairs and 1 lone pair of electrons.
C. PH3 (Phosphine) has a trigonal pyramidal shape. It has 3 bonding pairs and 1 lone pair of electrons.
D. BH3 (Borane) has a trigonal planar shape because it has 3 bonding pairs and no lone pairs of electrons.
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