Which of the following molecules does not have a planar geometry?
Correct answer: D. Phosphorus trichloride
- A. Benzene
- B. Boron trifluoride
- C. Ethene
- D. Phosphorus trichloride
Explanation
Phosphorus trichloride (PCl₃) has a trigonal pyramidal shape because the phosphorus atom has one lone pair. This lone pair repels the three P-Cl bonding pairs, lifting them out of a planar arrangement and producing a pyramidal geometry.
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