Natural and Synthetic Rubbers - Synthesis, Manufacturing and Properties - Engineering Sciences Previous Year Questions

1

2008 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2008

The glass transition temperature of raw natural rubber is

A

-70 °C

B

-10 °C

C

0 °C

D

+30 °C

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2

2008 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2008

Match the following rubbers in Group I with their applications in Group II and select the correct answer from (A), (B), (C) or (D).

Group I (rubbers)	Group II (applications)
P. Butyl rubber	1. Gaskets in chemical plants
Q. Fluorocarbon elastomer	2. Petrol hose
R. Natural rubber	3. Hand gloves
S. Nitrile rubber	4. Roofing membrane
	5. Tire inner liner

A

P-5, Q-1, R-3, S-2

B

P-1, Q-3, R-2, S-5

C

P-2, Q-3, R-1, S-4

D

P-3, Q-5, R-1, S-4

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3

2014 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2014

Neoprene is rendered non-inflammable because

A

it has a highly cross-linked structure

B

it has a highly linear chain structure

C

of the presence of chlorine atom in the structure

D

of the absence of chlorine atom in the structure

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4

2014 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2014

Nylon-6 is manufactured from

A

caprolactum

B

adipic acid and hexamethylene diamine

C

maleic anhydride and hexamethylene diamine

D

sebacic acid and hexamethylene diamine

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5

2014 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2014

Elastomers are characterized by

A

high modulus and high elongation at break

B

high modulus and low elongation at break

C

low modulus and high elongation at break

D

low modulus and low elongation at break

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6

2015 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2015

Butyl rubber is a copolymer of

A

Isobutylene and butadiene

B

Butadiene and 1-butene

C

Isobutylene and isoprene

D

Isoprene and 1-butene

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7

2015 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2015

Match the elastomers given below to their suitable application

A

P-3; Q-4; R-2; S-1

B

P-4; Q-3; R-2; S-1

C

P-3; Q-2; R-4; S-1

D

P-1; Q-4; R-2; S-3

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8

2018 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2018

Which one of the following polymers occurs naturally?

A

Bakelite

B

Teflon

C

Cellulose

D

Perspex

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9

2018 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2018

Rubbers are a class of polymer known for

A

High intermolecular forces

B

High T_g polymers

C

Crystalline polymers

D

Low intermolecular forces

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10

2018 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2018

Nylon 6 is manufactured from

A

Sebacic acid and hexamethylene diamine

B

Caprolactam

C

Adipic acid and hexamethylene diamine

D

Caprolactone

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11

2019 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2019

Hypalon is the trade name for

A

chlorosulfonated polyethylene

B

chlorinated polyethylene

C

ultra high molecular weight polyethylene

D

cross-linked polyethylene

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12

2021 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2021

Which one of the following is an elastomer?

A

Polyamide 6,6

B

Poly(ethylene terephthalate)

C

Vulcanized polybutadiene

D

High density polyethylene

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13

2022 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2022

In an ideal rubber, the primary factor responsible for elasticity up to small strains is

A

Change in both enthalpy and entropy

B

Change in enthalpy, but no change in the entropy

C

No change in enthalpy, but change in the entropy

D

Neither a change in enthalpy, nor a change in the entropy

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14

2024 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2024

Nitrile rubber is the copolymer of

A

styrene and butadiene

B

styrene and isoprene

C

styrene and acrylonitrile

D

butadiene and acrylonitrile

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15

2025 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2025

Polymer “Z” has a high melting point and it decomposes even before it melts. Hence, it is usually dissolved and subsequently regenerated. Rayon is one such regenerated form. Identify the polymer “Z” from the following options.

A

Urea formaldehyde

B

Poly(vinyl carbazole)

C

Cellulose

D

Poly(vinyl acetate)

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16

2026 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2026

Select the correct option to match the Polymer to its Major polymeric constituent from the table given below:

A

P-IV ; Q-III ; R-I ; S-II

B

P-IV ; Q-III ; R-II ; S-I

C

P-II ; Q-IV ; R-I ; S-III

D

P-II ; Q-IV ; R-III ; S-I

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17

2026 · Engineering Sciences · Synthesis, Manufacturing and Properties · Natural and Synthetic Rubbers

Engineering Sciences (XE) 2026

Select the correct option to match the Polymer to its most suitable Monomer(s) from the table given below:

A

P - II ; Q - IV ; R - III ; S - I

B

P - II ; Q - IV ; R - I ; S - III

C

P - IV ; Q - III ; R - II ; S - I

D

P - IV ; Q - I ; R - III ; S - II

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