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  4. Which of the following molecules has trigonal planar geometry?

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Q. Which of the following molecules has trigonal planar geometry?

AIPMTAIPMT 2005Chemical Bonding and Molecular Structure

Solution:

Boron trifluoride $BF _{3}$ molecule has trigonal planar geometry.
The central $B$ atom has $3$ bond pairs and $0$ lone pairs of electrons.
It undergoes $sp ^{2}$ hybridisation.
$IF _{3}$ has ''$T$" shaped geometry.
$P Cl _{3}$ and $NH _{3}$ have pyramidal geometry.