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B
H2O- bent
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C
AsF5- trigonal bipyramidal
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D
BF3- trigonal planar
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Solution
The correct option is CNF3- trigonal planar
NF3 has trigonal pyramidal geometry. N atom has one lone pair and three bond pairs of electrons. The electron pair geometry is tetrahedral and molecular geometry is trigonal pyramidal.
The bond angles are lower than tetrahedral bond angles due to lone pair - lone pair and lone pair-bond pair repulsions. N atom is sp3hybridised.