JEE Main > Polymers

Explore popular questions from Polymers for JEE Main. This collection covers Polymers previous year JEE Main questions hand picked by popular teachers.


Q 1.    

Correct4

Incorrect-1

Which one is used as a heterogeneous catalyst in polymerisation of ethylene into polyethene?

A

Walker catalyst

Ziegler-Natta catalyst

C

Wilkinson's catalyst

D

Ruthenium catalyst

Explanation

Q 2.    

Correct4

Incorrect-1

Which of the following is an example of natural polymer?

A

Polyester

B

Glyptal

Starch

D

Nylon- 6

Explanation

Q 3.    

Correct4

Incorrect-1

Which of the following is a synthetic rubber?

A

Buna-N

B

Buna-S

C

Neoprene

All of these

Explanation

Q 4.    

Correct4

Incorrect-1

Which of the following is correct about thermosetting polymers?

A

Thermosetting polymers are cross-linked polymers.

B

They do not melt (or soften) on heating.

C

Cross-linking is usually developed at the time of moulding where they harden irreversibly.

All of the above

Explanation

Q 5.    

Correct4

Incorrect-1

Di-n-butyl phthalate is

Plasticiser

B

Thermoplastic

C

Polymer

D

Thermosetting plastic

Explanation

Q 6.    

Correct4

Incorrect-1

Natural rubber is

A

Trans polyisoprene

Cis polyisoprene

C

Cis and trans isoprene

D

Neoprene

Explanation

Q 7.    

Correct4

Incorrect-1

The structural formula of the monomer of poly (methylmethacrylate) (PMMA) is

A

{tex} \mathrm { CH } _ { 2 } = \mathrm { CHCOOCH } _ { 3 } {/tex}

C

{tex} \mathrm { CH } _ { 3 } \mathrm { COOCH } = \mathrm { CH } _ { 2 } {/tex}

D

Explanation

Q 8.    

Correct4

Incorrect-1

Which one of the following compounds is polyester?

A

Bakelite

B

Nylon {tex} 6,6 {/tex}

Terylene

D

Rubber

Explanation

Q 9.    

Correct4

Incorrect-1

Nylon is classified as a condensation polymer because

A

in its preparation a solid is formed from liquid monomers

B

its structure contains the peptide linkage, {tex} - \mathrm { CONH } - {/tex}

C

it can be prepared from aqueous solutions of its monomers

a small molecule is eliminated in its formation from its monomers

Explanation

Q 10.    

Correct4

Incorrect-1

A polyurethane is the product of

toluene- {tex} - 2,6 {/tex} -disocyanate and ethylene glycol in presence of a blowing agent

B

E-caprolactum and ethylene glycol

C

terephthalic acid and ethylene glycol

D

an isocyanate and an alcohol

Explanation

Q 11.    

Correct4

Incorrect-1

Which of the following sets contains only thermoplastics?

A

Glyptal, Melmac, PAN

B

Polythene, Bakelite, Nylon-6

PVC, PMMA, Polystyrene

D

Polypropylene, Urea-formaldehyde, Teflon

Explanation

Q 12.    

Correct4

Incorrect-1

Which of the following sets forms the biodegradable polymer?

A

{tex} \mathrm { H } _ { 2 } \mathrm { C } = \mathrm { CH } - \mathrm { CN } {/tex} and {tex} \mathrm { H } _ { 2 } \mathrm { C } = \mathrm { CH } - \mathrm { CH } = \mathrm { CH } _ { 2 } {/tex}

B

{tex} \mathrm { H } _ { 2 } \mathrm { N } - \mathrm { CH } _ { 2 } - \mathrm { COOH } {/tex} and {tex} \mathrm { H } _ { 2 } \mathrm { N } - \left( \mathrm { CH } _ { 2 } \right) _ { 5 } - \mathrm { COOH } {/tex}

D

Explanation

Q 13.    

Correct4

Incorrect-1

Among cellulose, poly (vinyl chloride), nylon, and natural rubber, the polymer in which the intermolecular force of attraction is the weakest is

A

nylon

B

poly (vinyl chloride)

C

cellulose

natural rubber

Explanation

Q 14.    

Correct4

Incorrect-1

Ebonite is

A

polypropene

B

natural rubber

C

synthetic rubber

highly vulcanised rubber

Explanation

Q 15.    

Correct4

Incorrect-1

Which of the following polymers cannot be made by free radical addition polymerisation mechanism?

A

PE

B

HDPE

C

LDPE

Teflun

Explanation

Q 16.    

Correct4

Incorrect-1

Formation of polyethylene from calcium carbide takes place as follows:

The amount of polyethylene obtained from 64.1 kg of {tex}\mathrm {CaC_2}{/tex} is

A

7 kg

B

14 kg

C

21 kg

28 kg

Explanation

Q 17.    

Correct4

Incorrect-1

Which of the following rubber is not a polydiene?

A

Polyisoprene

B

Polychloroprene

Thiokol

D

Nitrile rubber

Explanation

Q 18.    

Correct4

Incorrect-1

Wash and wear clothes are manufactured using

A

nylon fibres

B

cotton mixed with nylon

terylene fibres

D

wool fibres

Explanation

Q 19.    

Correct4

Incorrect-1

The monomer of the polymer is

B

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

C

{tex} \mathrm { CH } _ { 3 } - \mathrm { CH } = \mathrm { CH } _ { 2 } {/tex}

D

Explanation

Q 20.    

Correct4

Incorrect-1

Which of the following sets contains only copolymers?

SBR. Glyptal, Nylon- {tex} 6,6 {/tex}

B

Polythene, polyester, PVC

C

Nylon- {tex} 6 , {/tex} butyl rubber, Neoprene

D

Melmac, Bakelite, Teflon

Explanation

Q 21.    

Correct4

Incorrect-1

Given the polymers, A = Nylon 6-6; B = Buna-S; C = Polythene Arrange these in decreasing order of their intermolecular forces.

{tex} \mathrm {A > C > B} {/tex}

B

{tex} \mathrm {B > C > A }{/tex}

C

{tex} \mathrm {A > B > C }{/tex}

D

{tex} \mathrm { C } > \mathrm { B } > \mathrm { A } {/tex}

Explanation

Q 22.    

Correct4

Incorrect-1

Which of the following monomers can undergo radical, cationic as well as anionic polymerisation with equal ease?

A

{tex} \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } - \mathrm { CH } = \mathrm { CH } _ { 2 } {/tex}

C

{tex} \mathrm { CH } _ { 2 } = \mathrm { CH } - \mathrm { CN } {/tex}

D

{tex} \mathrm { CH } _ { 2 } = \mathrm { CH } _ { 2 } {/tex}

Explanation

Q 23.    

Correct4

Incorrect-1

Gutta-percha is

A

{tex}Trans{/tex}-polyisoprene

B

Non-elastic and softens to a plastic-like material on heating

C

Used in underwater cables and golf balls

All of the above

Explanation

Q 24.    

Correct4

Incorrect-1

What is true regarding vulcanisation of rubber?

A

Rubber molecules are joined through {tex} \mathrm { S } - \mathrm { S } {/tex} linkage at the ends.

Rubber molecules are linked through {tex} \mathrm { S } - \mathrm { S } {/tex} linkage at the various parts of polymer backbone.

C

Vulcanisation makes rubber perfectly crystalline.

D

Vulcanisation converts rubber into a thermosetting polymer.

Explanation

Q 25.    

Correct4

Incorrect-1

Polymer formation from monomers starts by

condensation reaction between monomers

B

coordinate reaction between monomers

C

conversion of monomer to monomer ions by protons

D

hydrolysis of monomers.

Explanation