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NEET • CHEMISTRY • POLYMERS
Polymers practice · Easy
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31
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Which of the following is biodegradable polymer?
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Correct option: C
PHBV
The correct answer is C (PHBV) because PHBV (Polyhydroxybutyrate-co-hydroxyvalerate) is a biodegradable polyester produced by microorganisms.
32
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Which of the following is currently used as a true cord?
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Correct option: D
Nylon-6
Option D is correct because Nylon-6 is commonly used as tire cord due to its high tensile strength and elasticity.
33
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Which is/are true for elastomers?
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Correct option: D
All of the above
Option D (All of the above) is correct because all the statements accurately describe the properties of elastomers.
34
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Symbolic name for Teflon is:
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Correct option: A
Option A is correct because PTFE stands for Polytetrafluoroethylene, which is the chemical name for Teflon.
35
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On the basis of their mode of formation, the polymers can be classified as
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Correct option: D
Both addition and condensation polymers
Option D (Both addition and condensation polymers) is correct because polymers are classified based on their mode of formation into addition and condensation polymers.
36
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Which of the following statement about Nylon-2-nylon-6 is incorrect?
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Correct option: C
Nylon-2-nylon-6 is a non-biodegradable polymer
Option C (Nylon-2-nylon-6 is a non-biodegradable polymer) is correct because Nylon-2-nylon-6 *is* a biodegradable polymer.
37
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Assertion: PHBV is used for making orthopaedic devices.
Reason: PHBV is a biodegradable polymer.
Reason: PHBV is a biodegradable polymer.
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Correct option: A
Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
Option A (Both assertion and reason are correct statements, and reason is the correct explanation of the assertion) is correct because PHBV is used in orthopaedic devices due to its biodegradability.
38
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Acetate rayon is prepared from:
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Correct option: D
Cellulose
Option D is correct because acetate rayon is a modified cellulose fiber, produced by treating cellulose with acetic anhydride.
39
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Which of the following is not a cellulose product?
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Correct option: D
Dacron
Option D is correct because Dacron is a polyester, while gun cotton, celluloid, and rayon are cellulose derivatives.
40
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From the given statements, which one is not true?
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Correct option: D
Chlorophyll is a polymer
Option D (Chlorophyll is a polymer) is correct because chlorophyll is a pigment molecule, not a polymer.
41
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Which of the following does not cause pollution?
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Correct option: C
Use of solar energy
Option C (Use of solar energy) is correct because solar energy is a clean, renewable energy source that does not produce pollutants.
42
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Which are true for terpolymer?
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Correct option: D
All of the above
Option D (All of the above) is correct because a terpolymer contains three monomers, ABS plastic is a terpolymer, and ABS plastic is a polymer of acrylonitrile, butadiene, and styrene.
43
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A copolymer of isobutylene and isoprene is called:
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Correct option: A
Butyl rubber
Option A (Butyl rubber) is correct because butyl rubber is a copolymer specifically made from isobutylene and a small amount of isoprene.
44
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Which of the following is wrong?
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Correct option: C
SBR is called natural rubber
Option C (SBR is called natural rubber) is correct because SBR (styrene-butadiene rubber) is a synthetic rubber, while natural rubber is polyisoprene.
45
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Which is not true about polymers?
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Correct option: D
Polymers have low molecular weight
Option D (Polymers have low molecular weight) is correct because polymers are macromolecules and therefore have high molecular weights.
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46
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Choose the correct option from the following about the loss of raw rubber
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Correct option: D
All of these
Option D (All of these) is correct because raw rubber suffers from all the listed drawbacks: poor low-temperature properties, short library life, and inability to be used in power transmission.
Revision notes and key takeaways
Review POLYMERS in your textbook or class notes, then use this set to check your understanding.
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