Chemical Bonding And Molecular Structure Question 436
Question: The molecules $ BF_3 $ and $ NF_3 $ are both covalent compounds, but $ BF_3 $ is non polar whereas $ NF_3 $ is polar. The reason for this is
Options:
A) atomic size of boron is larger than nitrogen
B) Boron is metal while nitrogen is gas
C) $ B-F $ bonds are non-polar while $ N-F $ bonds are polar
D) $ BF_3 $ is planar but $ NF_3 $ is pyramidal
Show Answer
Answer:
Correct Answer: D
Solution:
- The shape of $ BF_3 $ is trigonal planar and $ \mu =0 $ hence it is non polar. The shape of $ NF_3 $ is pyramidal and $ \mu \ne 0 $ hence it is polar.
