Polymers Test

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Polymers Test - 53

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Weekly Quiz Competition

Question 1
1 / -0

Teflon is obtained by the polymerization of:

A
Monofluoroethene

B
Difluoroethene

C
Trifluoroethene

D
Tetrafluoroethene

Solution

Teflon is an addition polymer of tetrafluoroethylene (Tetrafluoroethene).

Hence, option $$D$$ is correct.
Question 2
1 / -0

Molecular mass of a polymer is:

A
Small

B
Very small

C
Negligible

D
Large

Solution

The molecular mass of a polymer chain can be obtained by multiplying the mass of each repeating unit by the degree of polymerization and then adding the mass of end groups.
A polymer is a substance or material consisting of very large molecules, or macromolecules, composed of many repeating subunits. Hence, the molecular mass of a polymer is large.

Hence, option $$D$$ is correct.
Question 3
1 / -0

Which one is a polymer compound?

A
$$SO_2$$

B
$$CO_2$$

C
$$CH_4$$

D
$$PVC$$

Solution

$$SO_2$$, $$CO_2$$ and $$CH_4$$ are chemical compounds and found in gas state at room temperature.
PVC (polyvinyl chloride) is the addition polymer of vinyl chloride.
Hence, option $$D$$ is the answer.
Question 4
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Natural rubber contains several thousand units of $$X$$, linked together in the polymer chain. $$X$$ is:

A
Neoprene

B
Isoprene

C
Chloroprene

D
Styrene

Solution

Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree. Natural rubber is from the monomer isoprene (2-methyl-1,3-butadiene). So, X is isoprene.
Hence, option B is correct.
Question 5
1 / -0

Which of the following has the largest molecular mass?

A
Monomer

B
Dimer

C
Polymer

D
Oligomer

Solution

Molecular mass is a number equal to the sum of the atomic masses of the atoms in a molecule.

A monomer is a molecule that forms the basic unit for polymers.

A dimer is an oligomer consisting of two monomers joined by bonds that can be either strong or weak, covalent, or intermolecular.

A polymer is a chemical compound with molecules bonded together in long, repeating chains.

An oligomer is a molecular complex of chemicals that consists of a few repeating units.

The polymer has the highest number of repeating units and hence, the maximum number of atoms, so it has the largest molecular mass.

Hence, option $$C$$ is corret.
Question 6
1 / -0

The monomer of natural polymer rubber is:

A
Neoprene

B
Isoprene

C
Chloroprene

D
Butadiene

Solution

Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree. Natural rubber is from the monomer isoprene (2-methyl-1,3-butadiene).
Hence, option $$B$$ is correct.
Question 7
1 / -0

Characteristic property of Teflon is:

A
2000 poise viscosity

B
High surface tension

C
Non-inflammable and resistant to heat

D
Highly reactive

Solution

Teflon is nonreactive, partly because of the strength of carbon-fluorine bonds.
Teflon is non-inflammable and resistant to heat so it is used in coating, particularly in non-sticking frying pans.

Hence, option $$C$$ is correct.
Question 8
1 / -0

Natural rubber is:

A
All-trans polyisoprene

B
Chloroprene

C
Buna-S

D
All-cis polyisoprene

Solution

Natural rubber is all cis polyisoprene.
Question 9
1 / -0

Bakelite is:

A
Chain-growth polymer

B
Step-growth polymer

C
Both (a) and (b)

D
Elastomer

Solution
Question 10
1 / -0

The basic unit of neoprene is:

A
Chloroprene

B
Isoprene

C
Styrene

D
Butadiene

Solution

The basic unit of neoprene is chloroprene, which forms neoprene by the process of polymerisation as shown in the above reaction.

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Polymers Test - 53

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Polymers Test - 53

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Question 1

Monofluoroethene

Difluoroethene

Trifluoroethene

Tetrafluoroethene

Solution

Question 2

Small

Very small

Negligible

Large

Solution

Question 3

$$SO_2$$

$$CO_2$$

$$CH_4$$

$$PVC$$

Solution

Question 4

Neoprene

Isoprene

Chloroprene

Styrene

Solution

Question 5

Monomer

Dimer

Polymer

Oligomer

Solution

Question 6

Neoprene

Isoprene

Chloroprene

Butadiene

Solution

Question 7

2000 poise viscosity

High surface tension

Non-inflammable and resistant to heat

Highly reactive

Solution

Question 8

All-trans polyisoprene

Chloroprene

Buna-S

All-cis polyisoprene

Solution

Question 9

Chain-growth polymer

Step-growth polymer

Both (a) and (b)

Elastomer

Solution

Question 10

Chloroprene

Isoprene

Styrene

Butadiene

Solution

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