JEE Main > Alcohols, Phenols and Ethers

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


Q 1.    

Correct4

Incorrect-1


Select schemes {tex} \mathrm { A } , \mathrm { B } , \mathrm { C } , {/tex} respectively, out of

A

I in all cases

B

I, II, III

II, III, I

D

III, I, II

Explanation

Q 2.    

Correct4

Incorrect-1

The reaction

A

Esterification

B

Double decomposition

Transesterification

D

None of these

Explanation

Q 3.    

Correct4

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A compound 'X' with molecular formula {tex}\mathrm{C_3H_8O}{/tex} can be oxidised to a compound 'Y' with the molecular formula {tex}\mathrm{C_3H_6O}{/tex},'X' is most likely to be:

Primary alcohol

B

Secondary alcohol

C

Aldehyde

D

Ketone

Explanation

Q 4.    

Correct4

Incorrect-1

Which 'A' gives blue color in the reaction?

A

{tex} \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { NO } _ { 2 } {/tex}

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

C

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

D

Explanation



Q 5.    

Correct4

Incorrect-1

Which of the following pairs cannot be distinguished by using Lucas reagent?

A

B

C

Explanation

Q 6.    

Correct4

Incorrect-1

A

C

D

Explanation

Q 7.    

Correct4

Incorrect-1

B

C

D

None

Explanation

Q 8.    

Correct4

Incorrect-1


Molecular formula of A increases by {tex} \mathrm { C } _ { 8 } \mathrm { H } _ { 8 } \mathrm { O } _ { 4 } {/tex} Number of OH group present in {tex} \mathrm { A } {/tex} are:

A

3

4

C

5

D

Explanation

Q 9.    

Correct4

Incorrect-1

A

B

D

{tex} \mathrm { CH } _ { 3 } - \mathrm { CH } = \mathrm { O } {/tex}

Explanation

Q 10.    

Correct4

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Which of the following reagents would carry out of the following transformation {tex} ? \left( \mathrm { D } = ^ { 2 } \mathrm { H } \right) {/tex}

{tex} \mathrm { NaBD } _ { 4 } {/tex} in {tex} \mathrm { CH } _ { 3 } \mathrm { OH } {/tex}

B

LiAlH {tex} _ { 4 } , {/tex} then {tex} \mathrm { D } _ { 2 } \mathrm { O } {/tex}

C

{tex} \left( \mathrm { NaBD } _ { 4 } \text { in } \mathrm { CH } _ { 3 } \mathrm { OD } \right. {/tex}

D

LiAlD_ {tex} _ { 4 } , {/tex} then {tex} \mathrm { D } _ { 2 } \mathrm { O } {/tex}

Explanation

Q 11.    

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Methyl propionate, {tex}\mathrm{CH_3CH_2COOCH_3}{/tex}, is heated with aqueous {tex}\mathrm{H_2SO_4}{/tex} in {tex}\mathrm{^{18}O}{/tex} labelled water. When the equilibrium is achieved, the labelled oxygen will be present in:

A

methyl alcohol

Propionic acid

C

unchanged methyl propionate

D

both propionic acid and methyl propionate

Explanation

Q 12.    

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Incorrect-1


Alcohol (Y) gives Lucas test immediately. Thus, (X) and {tex} ( Y ) {/tex} are, respectively:

{tex} \mathrm { CH } _ { 3 } \mathrm { COOC } _ { 2 } \mathrm { H } _ { 5 } ; \left( \mathrm { CH } _ { 3 } \right) _ { 3 } ( \mathrm { COH } ) {/tex}

B

{tex} \mathrm { HCOOC } _ { 3 } \mathrm { H } _ { 7 } ; \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { CH } \left( \mathrm { CH } _ { 3 } \right) \mathrm { OH } {/tex}

C

{tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { COOCH } _ { 3 } ; \left( \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \right) _ { 3 } \mathrm { COH } {/tex}

D

{tex} \mathrm { HCOOC } _ { 3 } \mathrm { H } _ { 7 } ; \mathrm { CH } _ { 3 } \left( \mathrm { CH } _ { 2 } \right) _ { 3 } \mathrm { OH } {/tex}

Explanation

Q 13.    

Correct4

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The enzymes {tex} A , B {/tex} and {tex} C {/tex} in the reaction sequence are: {tex} \left( C _ { 6 } H _ { 10 } O _ { 5 } \right) _ { n } \stackrel { A } { \longrightarrow } C _ { 12 } H _ { 22 } O _ { 11 } \stackrel { B } { \longrightarrow } C _ { 6 } H _ { 12 } O _ { 6 } \stackrel { C } { \longrightarrow } C _ { 2 } H _ { 5 } O H {/tex}

A

Invertase, Maltase, Zymase

Diastase, Maltase, Zymase

C

Maltase, Zymase, Invertase

D

Diastase, Zymase, Maltase

Explanation

Q 14.    

Correct4

Incorrect-1

A carbon compound A forms B with sodium metal and again A forms C with {tex}\mathrm{PCl_5}{/tex}, but B and C form diethyl ether. Therefore A, and B and C are :

{tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { OH } , \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { ONa } , \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl } {/tex}

B

{tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl } , \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { ONa } , \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { OH } {/tex}

C

{tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { OH } , \mathrm { C } _ { 2 } \mathrm { H } _ { 6 } , \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl } _ { 2 } {/tex}

D

{tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { OH } , \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl } , \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { ONa } {/tex}

Explanation

Q 15.    

Correct4

Incorrect-1

In order to obtain diethyl ether from ethanol and sulphuric acid, the latter is taken:

A

In equal amount of sulphuric acid

B

In slightly lesser amount of sulphuric acid

In excess amount of sulphuric acid

D

In far lesser amount of sulphuric acid

Explanation

Q 16.    

Correct4

Incorrect-1

A

B

C

Explanation

Q 17.    

Correct4

Incorrect-1

Which of the following is the final product in the reaction between benzoyl chloride and phenyl magnesium bromide?

A

B

C

{tex} \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { COOH } {/tex}

{tex} \left( \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \right) _ { 3 } \mathrm { COH } {/tex}

Explanation



Q 18.    

Correct4

Incorrect-1

The order of solubility of

in water is:

A

{tex} \mathrm { I } > \mathrm { II } > \mathrm { III } {/tex}

B

{tex} \mathrm { I } < \mathrm { II } < \mathrm { III } {/tex}

{tex} \mathrm { II } > \mathrm { III } > \mathrm { I } {/tex}

D

{tex} \mathrm { II } > \mathrm { I } > \mathrm { II } {/tex}

Explanation

Q 19.    

Correct4

Incorrect-1


Above conversion can be achieved by-

A

{tex} \mathrm { NaBH } _ { 4 } {/tex}

C

{tex} \mathrm { H } _ { 3 } \mathrm { O } ^ { + } {/tex}

D

{tex} \mathrm { PCC } {/tex}

Explanation

Q 20.    

Correct4

Incorrect-1

A

C

D

Explanation

Q 21.    

Correct4

Incorrect-1


Which one in not correct

A

C

D

Explanation

Q 22.    

Correct4

Incorrect-1

Which of the following is the best method for making isopropyl methyl ether?

A

{tex} \mathrm { CH } _ { 3 } \mathrm { I } + \left( \mathrm { CH } _ { 3 } \right) _ { 2 } \mathrm { CHOH } \longrightarrow {/tex}

{tex} \mathrm { CH } _ { 3 } \mathrm { I } + \left( \mathrm { CH } _ { 3 } \right) _ { 2 } \mathrm { CHO } ^ { - } \longrightarrow {/tex}

C

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 2 } \mathrm { CHI } + \mathrm { CH } _ { 3 } \mathrm { O } ^ { - } \longrightarrow {/tex}

D

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 2 } \mathrm { CHCl } + \mathrm { CH } _ { 3 } \mathrm { OH } \longrightarrow {/tex}

Explanation

Q 23.    

Correct4

Incorrect-1

Which sequence of steps describes the best synthesis of 2-methyl-{tex}3 {/tex}-pentanone?

A

B

D

Explanation

Q 24.    

Correct4

Incorrect-1

B

C

D

Explanation

Q 25.    

Correct4

Incorrect-1

The major product formed in the reaction is:

A

B

D

Explanation