Polymers Test

Result

Polymers Test - 19

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Weekly Quiz Competition

Question 1
1 / -0

Hair wigs are made from a co-polymer of vinyl chloride and acrylonitirile and is called :

A
PVC

B
dynel

C
polyacrylonitrile

D
cellulose

Solution

Dynel (Modacrylic) shares many properties of PVC and polyacrylonitrile.

Dynel is the fibre obtained by copolymerisation of acrylonitrile and vinyl chloride. It is an acrylic fibre used to made Hair wigs.

Option B is correct.
Question 2
1 / -0

Which of the following structures represents terylene?

A

B

C

D

Solution

The structure B represents terylene. It is an example of condensation polymerization.Also known as dacron, terylene is a condensation polymer of ethylene glycol and terephthalic acid. It is a step growth, linear copolymer.
Question 3
1 / -0

Which of the following has formaldehyde as one of the starting material?

A
Melmac

B
Alkyd resin

C
PAN

D
Acrilan

Solution

Melamine polymer is made of melamine resin.
Question 4
1 / -0

Which of the following is wrong?

A
PMMA is called plexiglass

B
PTFE is called teflon

C
SBR is natural rubber

D
LDPE is called low density polythene

Solution

SBR stands for styrene - butadiene rubber. It is a copolymer but it is a synthetic polymer and not natural rubber.
Question 5
1 / -0

Which names are associated with PMMA?

A
Melmac

B
Acrilan

C
Saran

D
Acrylite

Solution

The name acrylite is associated with PMMA.
PMMA is polymethyl methaacrylate. It is an addition homopolymer of methyl methacrylate ($$\displaystyle CH_2 =C(CH_3)COOCH_3 $$). It is known as plexiglass.
Question 6
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Which one of the following can be used as monomer in polymerisation reaction?

A
$$CH_{3}CH_{2}Cl$$

B
$$CH_{3}CH_{2}OH$$

C
$$C_{6}H_{6}$$

D
$$C_{3}H_{6}$$

Solution

$$ C_3H_6 $$ is propylene and is a monomeric unit for polymerisation of polypropylene.
Question 7
1 / -0

Novolac is:

A
a linear condensation product of phenol and formaldehyde

B
a cross linked condensation product of urea and formaldehyde

C
a cross linked condensation product of phenol and formaldehyde

D
a linear condensation product of urea and formaldehyde

Solution

Novolac is a linear condensation polymer.

Novolac is obtained by the condensation reaction of phenol with formaldehyde in the presence of either an acid or a base catalyst.

Option A is correct.
Question 8
1 / -0

The ratio between the number of carbon atoms and nitrogen atoms in melamine molecule is ____.

A
$$1 : 2$$

B
$$2: 1$$

C
$$2 : 3$$

D
$$3 : 2$$

Solution

Number of carbon atom $$= 3$$
Number of nitrogen atom $$= 6$$
$$\therefore $$ Ratio $$= 1 : 2 $$
Question 9
1 / -0

Which of the following is a condensation homopolymer?

A
Nylon - $$6$$

B
Nylon - $$6,\:6$$

C
Nylon - $$6,\:10$$

D
Dacron

Solution

Condensation homo polymer is the polymer which is formed by only one monomer and get polymerizes by condensation and loss of small compounds such as water, alcohol, etc. whereas all other examples given are examples of co-polymer.
Question 10
1 / -0

Bubble gum contains ________.

A
thiokol rubber

B
styrene - butadiene rubber

C
isobutylen - isoprene rubber

D
acrylonitrile - butadiene rubber

Solution

Bubble gum is a soft cohesive substance made up of butadiene-based synthetic rubber because it is cheaper to manufacture.