Chemistry
Polymers and Plastics
1,228 Questions
Polymers and plastics questions explore the properties, synthesis, and applications of various synthetic and natural polymers. Key topics include biodegradable plastics, vulcanization, and polymer nanocomposites. These concepts are frequently tested in science and engineering competitive exams.
Biodegradable plasticsPolymer nanocompositesVulcanization of rubberPolymer molecular weightAsphalt binders
Polymers and Plastics Questions
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Melamine
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Teflon
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Bakelite
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Nylon
B
Correct answer
Explanation
Teflon is used for non-stick coating on cookware.
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Isoprene
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Styrene
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Melamine and formaldehyde
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Phenol and formaldehyde
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None of the above
D
Correct answer
Explanation
Phenol and formaldehyde units combine to form bakelite.
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Bakelite
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Neoprene
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Polyacrylonitrile (PAN)
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Teflon
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None of the above
D
Correct answer
Explanation
It is a polymer of tetra-fluroethylene and is used for the coating of non-stick surfaces of utensils.
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Caprolactum
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Adipic acid and hexamethylenediammine
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Phenol and formaldehyde
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Styrene
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Ethene
A
Correct answer
Explanation
It is the monomer unit of nylon-6 and contains six carbon atoms.
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Buna-S
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Terylene
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Polythene
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Novolac
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None of the above
A
Correct answer
Explanation
It is a copolymer of 1,3-butadiene and styrene.
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All polymers are macromolecules but all macromolecules are not polymers.
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All macromolecules are polymers but all polymers are not macromolecules.
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Polymers having low degree of polymerization are called high polymers.
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Starch and cellulose are the examples of synthetic polymers.
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All of the above
A
Correct answer
Explanation
This is because a polymer has repeating structural units but a macromolecule may or may not have.
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Manmade polymer
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Natural polymer
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Biodegradable polymer
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Semi-synthetic polymer
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None of the above
A
Correct answer
Explanation
PVC is an example of manmade polymer or synthetic polymer.
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2, 4-addition
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1, 4-addition
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1, 4-condensation
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4, 4-addition
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4, 4-condensation
B
Correct answer
Explanation
The two carbons of two isoprene units are linked through C1 and C4.
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Vulcanization
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Oligomerization
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Sulphurization
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Coplymerization
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None of the above
A
Correct answer
Explanation
Natural rubber lacks cross-links which are present in vulcanized rubber.
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Elastomers are rubber like solids with elastic properties.
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Fibrous polymers involve strong intermolecular forces.
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Thermoplastic polymers soften on heating and harden on cooling.
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Thermosetting polymers are infusible due to large number of cross bonds.
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All statements are correct
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Trans-polyisoprene
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Cis-polyisoprene
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Buna-S
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Buna-N
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None of the above
A
Correct answer
Explanation
- CH2-CH2- groups of the monomers lie on the trans positions leading to the formation of gutta-purcha.
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Novolac
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PAN
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PVC
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Terylene
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None of the above
A
Correct answer
Explanation
It is formed by the combination of phenol and formaldehyde. Novolac further undergoes cross linking with the help of formaldehyde to form bakelite.
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Addition polymerisation
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Condensation polymerisation
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Cross-linked polymerisation
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Homopolymerisation
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Copolymerisation
B
Correct answer
Explanation
It is called step-growth polymerisation as the polymer is formed by the condensation of two monomers in one or many steps.
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Triethylaluminium
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Hydrogen peroxide (H2O2)
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Ethene
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Ziegler-Natta catalyst
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All of the above
B
Correct answer
Explanation
It is used as an initiator to start the polymerisation by forming free radicals of form LDP.
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Only 1 and 2
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Only 1, 3 and 4
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Only 2 and 3
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Only 2, 3 and 4
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All of these
B
Correct answer
Explanation
Terylene is a copolymer of ethylene glycol and terephthalic acid. Nylon 6,6 is a copolymer of hexamethylenediamine and adipic acid. Buna-N is a copolymer of 1,3 butadiene and acrylonitrile.