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Statement 1: o-nitrophenol has higher bo...

Statement 1: o-nitrophenol has higher boilling point than p-nitrophenol.
Statement 2: Intermolecular hydrogen bonding is present in p-nitrophenol and intrmolecular hydrogen bonding in o-nitrophenol.

A

If both A and R are true and R is the correct explanation of A.

B

If both A and R are true but R is not the correct explanation of A.

C

If A is true but R is false

D

If A is false but R is true.

Text Solution

Verified by Experts

The correct Answer is:
A
p-nitrophenol has higher boiling point than o-nitrophenol, because intermolecular hydrogen bonding present in p-nitrophenol is responsible for it. But intramolecular hydrogen bonding in o-nitrophenol does not effect boiling point.
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Draw intramolecular hydrogen bonding structure in o-nitrophenol .

Assertion : Boiling point of p-nitrophenol is greater than that of o-nitrophenol. Reason : There is intramolecular hydrogen bonding in p-nitrophenol and intermolecular hydrogen bonding in o-nitrophenol.

Statement I: p-Nitrophenol is a stronger acid than o-nitrophenol. Statement II: Intramolecular hydrogen bonding makes the o-isomer weaker than p-isomer.

o-Nitrophenol has lower/higher pk_(a) value than m-nitrophenol.

A : p - nitrophenol has high pK_(a) in comparison to o-nitrophenol R : In o-nitrophenol , intermolecular H-bonding is present

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