Organic Compounds Containing Halogens Question 9
Question: Although hexafluoroethane $ (C_2F_6,b.p.-79{}^\circ C) $ and ethane $ (C_2H_6,b.p.-89{}^\circ C) $ differ very much in their molecular weights, their boiling points differ only by $ 10{}^\circ C $ . This is due to
Options:
A) lowpolarizability of F
B) nearly similar size of F and H
C) both [a] and [b]
D) Neither of the two options
Show Answer
Answer:
Correct Answer: C
Solution:
Small difference in boiling points of $ C_2F_6 $ and $ C_2H_6 $ is due to the fact that (i) the F atom is slightly larger than H, and (ii) F has low polarizability
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