Chemical Bonding And Molecular Structure Question 515
Question: Which has the least bond angle [NCERT 1973; DPMT 1990; CBSE PMT 1990; UPSEAT 2003]
Options:
A) $ NH_3 $
B) $ BeF_2 $
C) $ H_2O $
D) $ CH_4 $
Show Answer
Answer:
Correct Answer: C
Solution:
Due to $ lp-lp $ repulsions, bond angle in $ H_2O $ is lower $ (104^{o}{{.5}^{o}}) $ than that in $ NH_3 $
$ (107^{o}) $ and $ CH_4(109^{o}2{8}’) $ . $ BeF_2 $ on the other hand, has sp-hybridization and hence has a bond angle of $ 180^{o} $ .
