Chemical Bonding And Molecular Structure Question 482
Question: During steam distillation of a mixture of o-nitrophenol and p-nitrophenol
Options:
A) vapours of o-nitrophenol are carried by steam because of its lower boiling point due to chelation.
B) vapours of o-nitrophenols are carried by steam because of its lower boiling point and solubility in steam.
C) vapours of o-nitrophenol are carried by steam because its boiling point is reduced by steam.
D) vapours of p-nitrophenol are carried by steam because of its lower boiling point.
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Answer:
Correct Answer: A
Solution:
- Only o-nitrophenol is capable of forming intra molecular H-bonding (chelation) which leads to its lower b.p. (less than $ 100^{o}C $ ) and also lower solubility in water (steam).
