Neet Solved Paper 2013 Question 40
Question: Which of the following is a polar molecule?
Options:
A) $ B{F_3} $
B) $ S{F_3} $
C) $ Si{F_4} $
D) $ Xe{F_4} $
Show Answer
Answer:
Correct Answer: B
Solution:
Symmetrical molecules are generally non-polar although they have polar bonds.
This is because bond dipole of one bond is cancelled by that of the other.
$ BF _3,SiF _4 $ and $ XeF _4 $ being symmetrical as non-polar.
$ SF _4 $ is unsymmetrical because of the presence of a lone pair of electrons. Due to which it is a polar molecule.
