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Which one of the following molecules has trigonal planar geometry ?

  1. A
    IF3
  2. B
    PCl3
  3. C
    NH3
  4. D
    BF3

Solution & Step-by-step Explanation

The trigonal planar geometry is characteristic of molecules with three bonding pairs and no lone pairs around the central atom, resulting in a bond angle of 120 degrees. Among the given options, BF3 (boron trifluoride) has a trigonal planar geometry because boron is bonded to three fluorine atoms with no lone pairs on the boron atom. IF3 (iodine trifluoride) has a T-shaped geometry due to the presence of two lone pairs on the iodine atom. PCl3 (phosphorus trichloride) has a pyramidal geometry due to the presence of one lone pair on the phosphorus atom. NH3 (ammonia) has a tetrahedral geometry with one lone pair on the nitrogen atom, resulting in a pyramidal shape.

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Which one of the following molecules has trigonal planar geometry ?
A
IF3
B
PCl3
C
NH3
D
BF3

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Inorganic Chemistry

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