Polymers Test

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Polymers Test - 38

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following fibres is made of polyamides?

A
Dacron

B
Orion

C
Nylon

D
Rayon

Solution

Nylon is a generic designation for a family of synthetic polymers, based on aliphatic or semi-aromatic polyamides.

Nylon is a thermoplastic silky material that can be melt-processed into fibers, films, or shapes.

$$Nylon-66$$ & $$nylon-6$$ are examples of condensation polymers made of polyamides.

Hence, option C is correct.
Question 2
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Favourable conditions for preparation of low density polythene (LDP) is:

A
high $$P$$, low $$T$$

B
low $$P$$, high $$T$$

C
high $$P$$, high $$T$$

D
low $$P$$, low $$T$$

Solution

Low density polythene are formed from ethene at high temperature and pressure. It is of ubiquitous nature and resistant to biodegradability. It has excellent mechanical properties, barrier properties against water, light weight, low cost and high energy effectiveness.
Question 3
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The characteristics of condensation polymerization are given below:
I. only C-C linkages present in the polymer structure
II. use of bifunctional or polyfunctional monomers
III. elimination of a small byproduct molecule
Which of the following is true?

A
I, II, III

B
Only III

C
I and II

D
II and III

Solution

Besides $$C-C$$ linkages, polymer structure also contains atoms as $$O, N, etc.$$, at regular intervals in the main chain. Example: nylon, terylene and polyester etc. whereas elimination occur in condensation polymerisation and in addition polymerisation monomers are polyfunctional.
Question 4
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A polymer used in paints is:

A
nomex

B
thiokol

C
saran

D
glyptal

Solution

Nomex is used in protective clothing for race car drivers and firefighters.

Thiokol is used in rubber.

Saran is used in bumpers.

Glyptal used in the manufacture of paints and lacquers.

Hence, option D is correct.
Question 5
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Polymer formation from monomers starts by:

A
Condensation reaction between monomers

B
Coordination reaction between monomers

C
Conversion of one monomer into other monomer

D
Hydrolysis of monomers

Solution

Polymer formation is caused by the condensation of 2 or more bifunctional monomers with the elimination of simple molecules like water, ammonia, alcohol etc. In these reactions, the product of each step is again a bifunctional species & the sequence of condensation goes on.

Hence, option A is correct.
Question 6
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Which of the following polymer is condensation as well as cross-linked polymer?

A
Bakelite

B
Nylon-6.6

C
Nylon-2,,Nylon-6

D
Dacron

Solution

The structure of cross linked polymer, Bakelite is shown above. It is formed by condensation polymerization of Phenol and formaldehyde monomers.

Option A is correct.
Question 7
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Which of the following polymer is used in pigment?

A
Buna- S

B
Neoprene

C
Teflon

D
Orlon

Solution

Buna-S is used to bind pigmented coatings. It is the polymer derived from styrene and buta-diene.
Question 8
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Which polymer is used in the preparation of hose-pipe?

A
Orlon

B
Polystyrene

C
Teflon

D
Altame

Solution

Teflon is used to prepare hose-pipe. Teflon inner layer excels in corrosion resistance and ensures flexibility.
Option C is correct.
Question 9
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Which is the correct structural formula for terylene?

A

B

C

D

Solution

Terylene is a synthetic polyester fibre produced by polymerizing ethylene glycol and terephthalic acid which is obtained from petroleum

Hence, option (C) represents the correct structural formula for terylene.
Question 10
1 / -0

Which of the following happens in initiation step of the free radical polymerisation?

A
Decomposition of initiator

B
Renewal of inhibitor

C
Addition of monomer molecules to the growing chains

D
Disproportionation