On account of the disruption in education due to the corona pandemic, we're opening up our platform for teachers, free of cost. Know More →

JEE Advanced > Alcohols, Phenols and Ethers

Explore popular questions from Alcohols, Phenols and Ethers for JEE Advanced. This collection covers Alcohols, Phenols and Ethers previous year JEE Advanced questions hand picked by experienced teachers.

Q 1.

Correct4

Incorrect-1

Ethyl alcohol is heated with conc {tex} \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 } {/tex} the product formed is

A

B

D

Explanation

Q 2.

Correct4

Incorrect-1

Which of the following is basic

B

C

D

Q 3.

Correct4

Incorrect-1

The compound which reacts fastest with Lucas reagent at room temperature is

A

butan {tex}- 1 - \mathrm { ol } {/tex}

B

butan {tex} - 2 - {/tex} ol

C

{tex} 2 - {/tex} methylpropan {tex} - 1 - {/tex} ol

{tex} 2 - {/tex} methylpropan{tex} - 2 - {/tex} ol

Explanation

Q 4.

Correct4

Incorrect-1

A compound that gives a positive iodoform test is

A

{tex} 1 - {/tex} pentanol

{tex} 2 - {/tex} pentanone

C

{tex} 3 - {/tex} pentanone

D

pentanal

Explanation

Q 5.

Correct4

Incorrect-1

Diethyl ether on heating with conc. {tex}\mathrm {HI} {/tex} gives two moles of

A

ethanol

B

iodoform

ethyl iodide

D

methyl iodide

Explanation

Q 6.

Correct4

Incorrect-1

An industrial method of preparation of methanol is

catalytic reduction of carbon monoxide in presence of {tex} \mathrm { ZnO } - \mathrm { Cr } _ { 2 } \mathrm { O } _ { 3 } {/tex}

B

by reacting methane with steam at {tex} 900 ^ { \circ } \mathrm { C } {/tex} with a nickel catalyst

C

by reducing formaldehyde with lithium aluminium hydride

D

by reacting formaldehyde with aqueous sodium hydroxide solution

Explanation

Q 7.

Correct4

Incorrect-1

In the conversion of {tex} ( \mathrm { A } ) {/tex} to {tex} ( \mathrm { B } ) {/tex}, the best method for the protection of {tex} ( \mathrm { OH } ) {/tex} group is:

Benzylation method

B

Silylation method

C

ROTHP method

D

Both (a) and (b)

Q 8.

Correct3

Incorrect-1

Chemical reaction of alcohols are mainly based on -{tex}\mathrm{OH}{/tex} group of alcohol. The oxygen atom of -{tex}\mathrm{OH}{/tex} group polarize both the {tex} \mathrm { C } - 0 {/tex} bond and the {tex} 0 - \mathrm { H } {/tex} bond of any alcohol. Polarization of the {tex} 0 - \mathrm { H } {/tex} bond makes the hydrogen partially positive and explain why alcohols are weak acids. Polarization of the {tex} \mathrm { C } - 0 {/tex} bond makes the carbon atoms partially positive. The polarization of {tex} \mathrm { C } - 0 {/tex} bond is responsible for the weak basic character of alcohols. On the basis of the above explanation, alcohols give two types of reactions.Which of the following alcohols is the strongest acid?

A

{tex} \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OH } {/tex}

B

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 3 } \mathrm { COH } {/tex}

{tex} \mathrm { CH } _ { 3 } \mathrm { OH } {/tex}

D

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 2 } \mathrm { CHCH } _ { 2 } \mathrm { OH } {/tex}

Explanation

Q 9.

Correct3

Incorrect-1


The compound {tex} ( \mathrm { C } ) {/tex} is:

B

C

D

Q 10.

Correct3

Incorrect-1


Which statement is wrong about the compound {tex}\mathrm{(B)}{/tex}?

A

{tex}\mathrm{(B)}{/tex} is obtained from {tex}\mathrm{(A)}{/tex} by acylation of activated ring at {tex}para{/tex}-position to one of the {tex}\mathrm{(OH)}{/tex} groups

B

{tex}\mathrm{(B)}{/tex} is obtained from {tex}\mathrm{(A)}{/tex} by esterification of one of the {tex}\mathrm{(OH)}{/tex} groups

C

{tex}\mathrm{(B)}{/tex} is obtained from {tex}\mathrm{(A)}{/tex} by alkylation in the activated ring at {tex}para{/tex}-position to one of {tex}\mathrm{(OH)}{/tex} groups

{tex}\mathrm{(B)}{/tex} is obtained from {tex}\mathrm{(A)}{/tex} by esterification of both {tex}\mathrm{(OH)}{/tex} groups

Explanation

Q 11.

Correct3

Incorrect-1


The compound {tex}\mathrm{(B)}{/tex} is:

A

C

D

Q 12.

Correct3

Incorrect-1


The compound {tex}\mathrm{(B)}{/tex} is:

A

C

D

Q 13.

Correct3

Incorrect-1


The compound {tex}\mathrm{(A)}{/tex} is:

A

C

D

Explanation







Q 14.

Correct3

Incorrect-1


The compound {tex}\mathrm{(C)}{/tex} is:

A

C

D

Q 15.

Correct3

Incorrect-1


The compound {tex}\mathrm{(B)}{/tex} is:

A

B

D