JEE Chemistry Polymers MCQs Set B

Question. Novolac is
(a) linear polymer
(b) synthetic rubber
(c) cross-linked polymer
(d) addition polymer

Answer: A

Question. Dacron is a –
(a) crease resistant
(b) polyamide
(c) addition polymer
(d) polymer of ethylene glycol and phthalic acid

Answer: A

Question. Soft drinks and baby feeding bottles are generally made up of
(a) Polystyrene
(b) Polyurea
(c) Polyurethane
(d) Polyamide

Answer: A

Question. Which is not an example of copolymer ?
(a) PVC
(b) ABS
(c) SAN
(d) Saran

Answer: A

Question. Which of the following is an use of butadiene – styrene copolymer?
(a) All of these
(b) Cable insulation
(c) Footwear components
(d) Manufacture of autotyres

Answer: A

Question. A homopolymer is obtained by polymerisation of
(a) one type of monomer units
(b) two types of monomer units
(c) either of the above
(d) None of the above

Answer: A

Question.  A copolymer of isobutylene and isoprene is called
(a) align butyl rubber
(b) buna-N
(c) buna-S
(d) thiokol

Answer: A

Question. Which one is a homopolymer?
(a) Neoprene
(b) Nylon
(c) Bakelite
(d) Terylene

Answer: A

Question. Polymerisation in which two or more chemically different monomers take part is called:
(a) copolymerisation
(b) addition polymerisation
(c) chain polymerisation
(d) homo polymerisation

Answer: A

Question. Natural rubber is a polymer of
(a) isoprene
(b) hexa-1, 3-diene
(c) butadiene2-methylbutadiene
(d) None of these

Answer: A

Question. Which one of the following statement is not true?
(a) Natural rubber has the trans -configuration at every double bond
(b) Buna-S is a copolymer of butadiene and styrene
(c) Natural rubber is a 1, 4 - polymer of isoprene
(d) In vulcanization the formation of sulphur bridges between different chains make rubber harder and stronger.

Answer: A

Question. Which of the following is not the property of natural rubber
(a) High elasticity
(b) Soft and sticky
(c) High water absorption capacity
(d) Low tensile strength

Answer: A

Question. Natural rubber is
(a) all cis-polysioprene
(b) Buna-N
(c) all trans polyisoprene
(d) chloroprene

Answer: A

Question. The process involving heating of rubber with sulphur is called
(a) Vulcanization
(b) Sulphonation
(c) Galvanisation
(d) Bessemerisaion

Answer: A

Question. Isoprene is a valuable substance for making
(a) synthetic rubber
(b) propene
(c) liquid fuel
(d) petrol

Answer: A

Question. Synthetic polymer which resembles natural rubber is
(a) neoprene
(b) chloroprene
(c) glyptal
(d) nylon

Answer: A

Question. Synthetic rubber is
(a) poly (halodiene)
(b) polyamide
(c) polyester
(d) polysaccharide

Answer: A

Question. Which of the following are example of synthetic rubber?
(i) Polychloroprene  (ii) polyacrylonitrile
(iii) Buna-N              (iv) cis-polyisoprene
(a) (i) and (iii)
(b) (iii) and (iv)
(c) (i) and (ii)
(d) (ii) and (iii)

Answer: A

Question. Which of the following is not a copolymer?
(a) Neoprene
(b) Buna–S
(c) Baketite
(d) Dacron

Answer: A

Question. In the manufacture of tyre rubber, the percentage of sulphur used as a crosslinking agent is
(a) 5%
(b) 0.5%
(c) 2%
(d) 10%

Answer: A

Question. Which of the following polymer is formed on reaction of 1,3–butadiene and acrylonitrile?
(a) Buna – N
(b) Dacron
(c) Buna–S
(d) Neoprene

Answer: A

Question. Which of the following monomers form biodegradable polymers?
(a) both
(b) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid
(c) Glycine + amino caproic acid
(d) None of these

Answer: A

Question. The polymer which undergoes environment degradation by microoganism is known as
(a) biodegradable polymer
(b) non-biodegradable polymer
(c) chain step polymerchain-growth polymer
(d) chain-growth polymer

Answer: A

Question. Generally, molecular mass of a polymer is over
(a) 10,000
(b) 500
(c) 100
(d) 1,000

Answer: A

Question. For natural polymers PDI is generally
(a) 1
(b) 1000
(c) 0
(d) 100

Answer: A

Question. Which of the following statement(s) is/are correct?
(i) Macromolecules have high molecular mass of order 10³ – 10⁷u.
(ii) Monomeric units are joined together by ionic or covalent bond.
(a) Only (i)
(b) Both (i) and (ii)
(c) Only (ii)
(d) Neither (i) nor (ii)

Answer: A

Question. Consider the following statements.
(i) Polystyrene is a homopolymer whereas Buna–N is a copolymer.
(ii) Condensation polymers can be obtained by condensation between two similar bi–functional monomeric units.
(iii) Elastomers are the polymers in which the polymeric chains are held together by the weakest intermolecular forces.
(iv) Buna–S and Buna–N consist of close packing of chains which impart them crystalline nature.
Which of the following is the correct code for the statements above?
(a) TFTF
(b) TFFT
(c) TTFF
(d) FTFT

Answer: A

Question. Two condensation polymers are made
(1) ethylene diamine + ethane–1, 2– dicarboxylic acid
(2) trimethylenediamine + ethane–1, 2– dicarboxylic acid if both polymers of same molecular weight are obtained then which of the following statements is/are correct ?
(i) Polymer (1) is found to melt at lower temperature.
(ii) Polymer (2) is found to melt at lower temperature.
(iii) H-bonding is major factor.
(a) (ii) and (iii)
(b) Only (ii)
(c) (i), (ii) and (iii)
(d) (i) and (iii)

Answer: A

Question.  Which of the following statements are correct?
(i) A polyamide nylon 6,6 prepared by the condensation polymerisation of hexamethylene diamine with adipic acid is used in the manufacture of tyre cords.
(ii) Terylene is crease resistant and is blended with cotton and wool fibres for various applications.
(iii) Condensation reaction of phenol and formaldehyde to form novolac can be catalysed either by acid or base.
(iv) Melamine formaldehyde polymer is mainly used in the manufacture of electrical switches
(a) (ii) and (iii)
(b) (ii), (iii) and (iv)
(c) (i), (ii) and (iii)
(d) (iii) and (iv)

Answer: A

Question. Read the following statements.
(i) Rubber latex is a colloidal dispersion of rubber in water.
(ii) Natural rubber is a cis –1, 4–polyisoprene having elastic properties due to coiled structure and weak van der Waal’s forces.
(iii) Vulcanisation of natural rubber with sulphur and an appropriate additive is carried out above 415K.
(iv) In the manufacture of tyre rubber, 5% of sulphur is used as a cross-linking agent.
(v) Synthetic rubbers are homopolymers.
Which of the following is the correct code for the statements above?
(a) TTFTF
(b) FFTTF
(c) FFTFT
(d) TTFFF

Answer: A

Question. Which of the following statements are correct?
(i) Buna–N being resistant to the action of petrol, lubricating oil and organic solvents is used in making oil seals.
(ii) Biodegradable polymers are manufactured because of low chemical resistance, strength and durability of conventional polymers.
(iii) PHBV is a copolymer used in the manufacture of orthopaedic devices.
(iv) Nylon 2–nylon 6 is a biodegradable polymer.
(a) (i), (iii) and (iv)
(b) (i), (ii) and (iii)
(c) (ii), (iii) and (iv)
(d) (i) and (iv)

Answer: A

Question. Assertion : Olefinic monomers undergo addition polymerisation.
Reason : Polymerisation of vinylchloride is initiated by peroxides/ persulphates.
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct

Answer: A

Question. Assertion : Teflon has high thermal stability and chemical inertness.
Reason : Teflon is a thermoplastic.
(a) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(b) Assertion is correct, reason is correct; reason is a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct

Answer: A

Question. Assertion : Bakelite is a thermosetting polymer.
Reason : Bakelite can be melted again and again without any change
(a) Assertion is correct, reason is incorrect
(b) Assertion is incorrect, reason is correct
(c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: A

Question. Assertion : In vulcanisation of rubber, sulphur cross links are introduced.
Reason : Vulcanisation is a free radical initiated chain reaction.
(a) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(b) Assertion is correct, reason is incorrect
(c) Assertion is incorrect, reason is correct
(d) Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Answer: A

Question. Assertion : Most of the Synthetic polymers are not biodegradable.
Reason : Polymerisation process induces toxic character in organic molecules
(a) Assertion is incorrect, reason is correct
(b) Assertion is correct, reason is incorrect
(c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: A

Question. Assertion : The time of vulcanisation and temperature is increased by adding accelerators.
Reason : By vulcanising, a material of high tensile strength can be obtained.
(a) Assertion is incorrect, reason is correct
(b) Assertion is correct, reason is incorrect
(c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: A

Question. The polymer containing strong intermolecular forces e.g. hydrogen bonding, is
(a) nylon 6, 6
(b) natural rubber
(c) teflon
(d) polystyrene

Answer: A

Question. Among cellulose, poly (vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is
(a) natural rubber
(b) poly (vinyl chloride)
(c) nylon
(d) cellulose

Answer: A

Question. Which one of the following polymers is prepared by condensation polymerisation?
(a) Nylon-66
(b) Natural rubber
(c) Teflon
(d) Styrene

Answer: A

Question. When condensation product of hexamethylenediamine and adipic acid is heated to 525K in an atmosphere of nitrogen for about 4-5 hours, the product obtained is
(a) liquid polymer of nylon 66
(b) solid polymer of nylon 66
(c) gaseous polymer of nylon 66
(d) liquid polymer of nylon 6

Answer: A

Question. Arrange the following in increasing order of their melting point. Nylon 2,2 (1); Nylon 2,4 (2), Nylon 2,6 (3), Nylon 2,10(4)
(a) 4, 3, 2, 1
(b) 3, 4, 2, 1
(c) 1, 2, 3, 4
(d) 2, 1, 3, 4

Answer: A

Question. Which of the following rubber is not a polydiene?
(a) Thiokol rubber
(b) Polyisoprene
(c) Polychloroprene
(d) Nitrile rubber

Answer: A