Q.

Column I Reactions Column II Mechanism

a
p Ring expansion

b
q Ring contraction

c
r Carbocation

d
s Rearrangement

t Radical anion

Alcohols Phenols and Ethers Report Error

A

B

C

D

Solution:

c. It is an examnle of Beckmann rearrangement reaction.
d. It is an example of bimolecular reduction (formation of pinacol) followed by acid-catalysed rearrangement reaction to form pinacolone. The formation of pinacol proceeds by the formation of a radical anion intermediate.

Questions from Alcohols Phenols and Ethers

1. The correct IUPAC name of the organic compound

KEAM 2014

2. Order of acidic nature of the following compounds is

AIIMS 2019

3. Assertion: Phenol reacts with in presence of NaOH to form methoxybenzene.
Reason : Phenoxide is better nucleophile than phenol.

AIIMS 2019

4. Assertion : Hydroquinone is more acidic than resorcinol.
Reason : group shows .

AIIMS 2019

5. Dehydration of which one of the following alcohols produces an alkene exhibiting isomerism?

KEAM 2015

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3. An organic compound contains (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of is is ]

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4. At standard conditions, if the change in the enthalpy for the following reaction is Given that bond energy of and is and , respectively, what is the bond energy (in of ?

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5. The density of 2 M aqueous solution of NaOH is 1.28 g/cm. The molality of the solution is
[Given that molecular mass of NaOH = 40 g mol]

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