Polymers Test

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Polymers Test - 13

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Weekly Quiz Competition

Question 1
1 / -0

Methanal and Phenol react in the presence of base to give:

A
Bakelite

B
Polyethylene

C
Dacron

D
Nylon - $$6,\:6$$

Solution

Bakelite is formed by condensation reaction of phenol with formaldehyde, i.e., methanal.
Question 2
1 / -0

The process of vulcanization was introduced by ____

A
Charles Goodyear

B
Kolbe

C
Wohler

D
Zeigher

Solution

Charles Goodyear invented vulcanization process in $$1839$$.
Vulcanisation is a process involving heating of rubber with sulphur is called vulcanisation.
Question 3
1 / -0

Chloroprene is used in making

A
synthetic rubber

B
plastic

C
petrol

D
All of the above

Solution

Chloroprene is the monomer of neoprene, a synthetic rubber formed by the free radical polymerisation of choloroprene.

$$nCH_2-CCl-CH=CH_2 \xrightarrow {Polymerisation} -[CH_2-CCl=CH-CH_2]-$$
Question 4
1 / -0

The synthetic polymer which resembles natural rubber is:

A
Neoprene

B
Buna-S

C
Nylon

D
Rayon

Solution

Neoprene resembles natural rubber.

Natural rubber is a linear polymer of $$2$$-methyl-$$1,\:3$$-butadiene called as isoprene and Neoprene is a linear polymer of $$2$$-chloro-$$1,\:3$$-butadiene called as chloroprene.

Option A is correct.
Question 5
1 / -0

For natural polymers, PDI is generally ___

A
$$0$$

B
$$1$$

C
$$100$$

D
$$1000$$

Solution

For natural polymers, PDI (Polydispersity Index) is generally equal to $$1$$, which means that they are monodisperse. Such polymers are more homogeneous.
Question 6
1 / -0

Buna-S is a copolymer of:

A
styrene and $$1,\:3$$ - butadiene

B
styrene and ethylene

C
$$1,\:3$$ - butadiene and ethylene

D
$$1,\: 3$$ - butadiene and acrylonitrile

Solution

Buna-S is formed from styrene and $$1,\:3$$ - butadiene.
The reaction is shown below:
$$nCH_2=CH-CH=CH_2 + nC_6H_5CH=CH_2 \rightarrow -(CH_2-CH=CH-CH_2-CH_2-CH(C_6H_5)-CH_2)_n-$$
Question 7
1 / -0

Match List 1 with List 2 and choose the correct option.

List 1 List 2
A. Teflon 1. Making electrical switches
B. PVC 2. Flame resistant
C. Melamine 3. Non-stick coating of cookware
D. Bakelite 4. Thermoplastic

A
A-4, B-3, C-2, D-1

B
A-3, B-4, C-2, D-1

C
A-3, B-4, C-1, D-2

D
A-2, B-4, C-3, D-1

Solution

PVC is polyvinyl chloride and is used to produce synthetic plastic polymer. It is of two forms rigid and flexible.

Teflon is polytetrafluoroethylene. It is used as a non-stick coating for pans and it is non-reactive.

Melamine is 1,3,5-triazine. It is combined with formaldehyde to produce melamine resin and melamine foam is used as thermal insulating material.

Bakelite is a thermosetting phenol formaldehyde resin formed from the elimination reaction phenol and HCHO.

The correct match is A-3, B-4, C-2, D-1
Question 8
1 / -0

$$1,\:3$$ - butadiene and acrylonitrile undergo co-polymerization to give ___

A
Buna - S

B
Buna - N

C
Buna - A

D
All

Solution

Buna-N is co-polymer of 1,3 butadiene and acrylonitrile.

Hence, the correct option is $$\text{B}$$
Question 9
1 / -0

Polyester is made up of the repeating units of a chemical called:

A
ester

B
ether

C
cotton

D
ethene

Solution

Polyester is a man-made or synthetic fibre made up of repeating units of a chemical substance called esters. Esters are sweet smelling compounds, which are primarily made of carbon, hydrogen, and oxygen.
Question 10
1 / -0

Plexiglass is a polymer of ____.

A
acrylic acid

B
methylacrylate

C
methyl methacrylate

D
methyl propacrylate

Solution

Plexiglass is a very important commercial polymer because of its high resisting properties. It is a polymer of methyl methacrylate.
The structure of the $$methyl methacrylate$$ is given above.

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Re-Attempt Weekly Quiz Competition

List 1	List 2
A. Teflon	1. Making electrical switches
B. PVC	2. Flame resistant
C. Melamine	3. Non-stick coating of cookware
D. Bakelite	4. Thermoplastic

Polymers Test - 13

Result

Polymers Test - 13

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Question 1

Bakelite

Polyethylene

Dacron

Nylon - $$6,\:6$$

Solution

Question 2

Charles Goodyear

Kolbe

Wohler

Zeigher

Solution

Question 3

synthetic rubber

plastic

petrol

All of the above

Solution

Question 4

Neoprene

Buna-S

Nylon

Rayon

Solution

Question 5

$$0$$

$$1$$

$$100$$

$$1000$$

Solution

Question 6

styrene and $$1,\:3$$ - butadiene

styrene and ethylene

$$1,\:3$$ - butadiene and ethylene

$$1,\: 3$$ - butadiene and acrylonitrile

Solution

Question 7

A-4, B-3, C-2, D-1

A-3, B-4, C-2, D-1

A-3, B-4, C-1, D-2

A-2, B-4, C-3, D-1

Solution

Question 8

Buna - S

Buna - N

Buna - A

All

Solution

Question 9

ester

ether

cotton

ethene

Solution

Question 10

acrylic acid

methylacrylate

methyl methacrylate

methyl propacrylate

Solution

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