JEE Main On 16 April 2018 Question 14
Question: The incorrect geometry is represented by _________. [JEE Main 16-4-2018]
Options:
A) $ NF _3- $ trigonal planar
B) $ H _2O- $ bent
C) $ AsF _5- $ trigonal bipyramidal
D) $ BF _3- $ trigonal planar
Show Answer
Answer:
Correct Answer: A
Solution:
- $ NF _3 $ 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 $ sp^{3} $ hybridised.
