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Test: Polymers

25 Questions MCQ Test Chemistry for JEE | Test: Polymers

Description

Attempt Test: Polymers | 25 questions in 35 minutes | Mock test for NEET preparation | Free important questions MCQ to study Chemistry for JEE for NEET Exam | Download free PDF with solutions

QUESTION: 1

For macromolecules to form, one more of the following criteria are essential

A.
by joining of repeating structural units on a large scale
B.
the molecules in C are linked to each other by covalent bonds
C.
The repeating structural units are derived from some simple and reactive molecules
D.
All of these

Solution:

Macromolecule is made by joining smaller molecules(monomers)by covalent bond formation.

QUESTION: 2

One of the statements below is not true for the classification of polymers can be classified on the basis of their

A.
resistance to different agents
B.
mode of polymerisation
C.
structure of the polymers
D.
unique mechanical properties

Solution:

Polymer cannot be classified on the basis of their resistance to different agents.

QUESTION: 3

Identify the type of polymer. —A—B—B—A—A—A—B—A—

A.
Homopolymer
B.
Condensation polymer
C.
Cross – linked polymer
D.
Copolymer

Solution:

This is copolymer is polymer made up of different monomers.

QUESTION: 4

Which of the following polymers have tetrafluoroethene monomer units?

A.
Polystyrene
B.
Acrilan
C.
Nylon
D.
Teflon

Solution:

Teflon has CF₂=CF₂ as monomer unit.

QUESTION: 5

Cellulose acetate (rayon) and cellulose nitrate are __________ polymers

A.
Natural polymers
B.
Semi – synthetic polymers
C.
Synthetic polymers
D.
Linear polymers

Solution:

It is semi synthetic polymer.

QUESTION: 6

One of the following rubbers is used in making oil seals, tank lining, etc.

A.
Buna – S
B.
Neoprene
C.
Buna – N
D.
None of these

Solution:

Buna N is used in making oil seals , tank linings.

QUESTION: 7

Which of the following polymer can be formed by using the monomer unit represented below?

A.
Nylon 2–nylon 6
B.
Nylon 6
C.
Nylon – 6, 6
D.
Melamine polymer

Solution:

Nylon – 6, 6 Caprolactum is monomer of nylon 6.

QUESTION: 8

Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide?

A.
Tertiary butyl chloride
B.
Isohexane
C.
Neohexane
D.
Neopentane

Solution:

Since we are getting monosubstituted alkyl halide so it is neopentane.

QUESTION: 9

Polythene is not one of the following?

A.
Branched chain polymers
B.
Semi – synthetic polymer
C.
Linear polymer
D.
Synthetic polymer

Solution:

Polymer is not semi synthetic. It is synthetic.

QUESTION: 10

Melamine is

A.
Linear polymer
B.
Cross linked polymer
C.
Semi – synthetic polymer
D.
Branched chain polymers

Solution:

QUESTION: 11

Nylon – 2 – Nylon – 6 is

A.
biodegradable polymer
B.
copolymer
C.
homopolymer
D.
condensation polymer

Solution:

They both are biodegradable polymer.

QUESTION: 12

Which of the following statements about low density polythene is FALSE?

A.
It is a poor conductor of electricity.
B.
Its synthesis required dioxygen or a peroxide initiator as a catalyst.
C.
It is used in the manufacture of buckets, dust-bins etc.
D.
Its synthesis requires high pressure.

Solution:

Low density polythene : It is obtained by the polymerisation of ethene under high presure of 1000-2000 atm. at a temp. of 350 K to 570 K in the pressure of traces of dioxygen or a peroxide initiator (cont). Low density polythene is chemically inert and poor conductor of electricity. It is used for manufacture squeeze bottles. toys and flexible pipes.

QUESTION: 13

One of the following is used in speciality packaging, orthopaedic devices and in controlled release of drugs.

A.
Buna – N
B.
Polyvinyl chloride
C.
PHBV
D.
Buna – S

Solution:

PHBV [Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)] find its applications in controlled release of drugs, medical implants and repairs, speciality packaging, orthopaedic devices and manufacturing bottles for consumer goods.

QUESTION: 14

Formation of Buna – S, involves polymerization of

A.
Styrene
B.
Polypropylene
C.
1, 3 – Butadiene and Styrene
D.
1, 3 – Butadiene

Solution:

Buna S involves the polymerization of 1, 3 butadiene and styrene.

QUESTION: 15

In the following reaction, the polymer formed is ?

A.
Buna – S
B.
Neoprene
C.
PHBV
D.
Nylon – 2 – Nylon – 6

Solution:

These monomers form PHBV.

QUESTION: 16

Dacron is manufactured by heating a mixture of ethylene glycol and terephthalic acid with one of the Conditions given below.

A.
by heating with water at a high temperature
B.
condensation polymerisation under high pressure and at high temperature
C.
at 420 to 460 K in the presence of zinc acetateantimony trioxide catalyst
D.
None of these

Solution:

Dacron is manufactured by heating a mixture of ethylene glycol and terephthalic acid at 420 to 460K in presence of SnO₃ as catalyst.

QUESTION: 17

Painting material among the following is

A.
Glyptal
B.
Polypropene
C.
Polyvinyl chloride
D.
Polystyrene

Solution:

Painting material is Gyptal.

QUESTION: 18

Which one of the following is not a condensation polymer?

A.
Dacron
B.
Neoprene
C.
Melamine
D.
Glyptal

Solution:

The correct answer is Option B.
Neoprene is not a condensation polymer. It is an additional polymer.
Neoprene is made from monomer chloroprene (2-chlorobuta-1,3-diene).
Dacron, Melamine and Glyptal are condensation polymers.
Dacron ( also known as terylene) is a polyester made by condensation polymerisation of ethylene glycol and dimethyl terephthalate.
Glyptal is a copolymer of ethylene glycol and phthalic acid.
Melamine ( or formaldehyde melamine polymer) is obtained from condensation polymerisation of melamine with formaldehyde.

QUESTION: 19

The below molecule is called?

A.
polyester
B.
PVC
C.
polystyrene
D.
polythene

Solution:

This polymer is polyvinylchloride.

QUESTION: 20

In vulcanisarion of rubber,

A.
sulphur crosslinks are introduced
B.
sulphur reacts to form a new compound
C.
sulphur adds new protective layer over rubber
D.
None of these

Solution:

In vulcanization of rubber sulphur crosslinking is introduced.

QUESTION: 21

Bakelite is used for making

A.
laminated sheets
B.
electrical switches
C.
water pipes.
D.
paints

Solution:

Bakelite is used in making electrical switches.

QUESTION: 22

The correct name of the polymer below is:

A.
Dacron
B.
Novolac
C.
Melamine polymer
D.
Bakelite

Solution:

The correct answer is Option B.
Novolac
-> Linear structure formed as a product of condensation reaction between phenol and formaldehyde with excess of phenol.
-> It is used in paints

QUESTION: 23

Rubber tree is found in

A.
India
B.
Russia
C.
Mauritius
D.
Japan

Solution:

Rubber tree is found in India.

*Multiple options can be correct

QUESTION: 24

Which of the following monomers form biodegradable polymers?

A.
3-hydroxybutyric acid + 3-hydroxypentanoic acid
B.
Ethylene glycol + phthalic acid
C.
Glycine + aminocaproic acid
D.
Caprolactam

Solution:

Poly-β−hydroxybutyrate co-β− valerate (PHBV). It is obtained by the copolymerization of 3−hydroxybutyric acid and 3−hydroxypentanoic acid. PHBV is used in specially packaging orthopedic devices and in controlled release of drugs. PHBV undergoes bacterial degradation in the environment.
Nylon−2−. It is an alternating polyamide copolymer of glycine (H₂N−CH₂−COOH) and aminocaproic acid [NH₂(CH₂)₅COOH] and is biodegradable.