CBSE Questions for Class 12 Engineering Chemistry Polymers Quiz 12 - MCQExams.com

Which one is classified as a condensation polymer?
  • Teflon
  • Acrylonitrile
  • Dacron
  • Neoprene
Gutta Percha is_________.
  • trans-polyisoprene
  • non-elastic and softens to a plastic-like material on heating
  • used in underwater cables and golf balls
  • All of the above
Which of the following are used as free radical chain initiators ?
  • Benzoyl peroxide
  • di-tert-butyl peroxide
  • Carbon tetrachloride
  • Benzoquinone
Which of the following are biodegradable polymers?
  • Nylon - $$6,\: 6$$
  • PHBV
  • Nylon - $$2$$ - Nylon - $$6$$
  • Polychloroprene
Nylon$$-5,\:10$$ can be prepared by:
  • $$H_2N(CH_2)_5NH_2+$$ $$\text{Decanoic acid (Sebacic acid)}$$
  • $$HOOC(CH_2)_3COOH+H_2N(CH_2)_{10}NH_2$$
  • $$H_2N(CH_2)_6NH_2+HOOC(CH_2)_8COOH$$
  • $$H_2N(CH_2)_{10}NH_2+HOOC(CH_2)_4COOH$$
Isoprene is the repeating unit in :
  • vitamin A
  • terpenes
  • natural rubber 
  • All of the above
Which of the following polymers contains $$1,\: 3$$-butadiene as one of the monomers ?
  • Butyl rubber
  • Nitrile rubber
  • ABS plastic
  • SBR
Polymerisation of buta - $$1,\:3$$ - diene by free radical mechanism gives___________.
  • trans - $$1,\: 4$$ - Polybutadiene
  • cis - $$1, \:4$$ - Polybutadiene
  • Polyvinyl polyethene
  • Polyallyl polythene
Terylene (Dacron) is the polyester of
  • Hexamethylenediamine and adipic acid
  • Vinyl chloride and formaldehyde
  • Melamine and formaldehyde
  • Ethylene glycol and terephthalic acid
SBR (GRS, Buna-S, Cold Rubber) is obtained by free radical copolymerisation of :
  • $$70\%$$ Buta - $$1, \:3$$ - diene and $$30\%$$ phenly ethene (styrene)
  • chloroprene and styrene
  • vinly-acetylene and styrene
  • isoprene and $$1,\: 3$$ - butadiene
GRA is a copolymer of __________________.
  • butadiene and acrylonitrile
  • butadiene and adipic acid
  • chloroprene and acrylonitrile
  • chloroprene and adipic acid
Free radical polymerisation requires a free radical initiator. The most commonly used free radical initiator is:
  • $$Ph-CO-O-O-COPh$$ (benzoylperoxide)
  • $$(CH_3)_3C-O-O-C(CH_3)_3$$ (tert-butyl peroxide)
  • $$Ph-N-(NO)-Ph$$ (azoxybenzene)
  • $$CH_2N_2$$ (diazomethane)
Saran is a copolymer of ___________.
  • vinyl chloride and vinyl acetate
  • vinylidene chloride and vinyl chloride
  • ethylene chloride and vinyl chloride
  • vinyl acctate and methyl acetate
If $$N_1,\ N_2, \ N_3,....$$ are the number of molecules with molecular masses $$M_1,\ M_2,\ M_3, ...$$ respectively, then mass average molar mass is expressed as :
  • $$\dfrac{\sum NiMi^2}{\sum NiMi}$$
  • $$\dfrac{\sum NiMi}{\sum Ni}$$
  • $$\dfrac{\sum Mi^2}{\sum Ni}$$
  • $$\dfrac{\sum NiMi}{\sum Mi}$$
Molecular weights of macromolecules are determined by :
  • elevation of boiling point
  • depression in freezing point
  • osmotic pressure
  • None of these
Average molecular mass of a polymer is determined by:
  • light scattering and ultracentrifuge method.
  • osmotic pressure.
  • depression of freezing point.
  • elevation in boiling point.
The monomer $$\left(G = Me \  or \  Cl\right)$$ when treated with Zieglar - Natta catalyst undergo polymerisation as shown in the figure. Which of the following statement is not true considering the process given above?
301017.png
  • The general class of polymer formed is known as homopolymer
  • The polymer obtained is stereoregular
  • Buna-N can be prepared using above process
  • Synthetic rubber can be formed by above process using $$1,3$$ - butadiene
Which one of the following is prepared using only one type of material ?
  • Polycot
  • Polywool
  • Terrycot
  • Polyester
Which of the following statements is not true?
  • Silk is a protein
  • Polyurethane foams are used for making pillows
  • HDPE is prepared by Ziegler Natta polymerization
  • Viscose fabric is not made from cellulose
The polymer obtained with methylene bridges by condensation polymer is:
  • PVC
  • Buna-S
  • Polyacrylonitrile
  • Bakelite
The natural rubber is the polymer of
  • 1,3-butadiene
  • Polyamide
  • Isoprene
  • None of these

Identify from the above monomers which undergo condensation polymerization.
475116_c871109b4c4941d8b8d221614bbe17b3.png
  • 3, 5
  • 1, 3
  • 1, 6
  • 2, 4
The polymer used as packaging material in orthopaedic devices and for controlled drug release is:
  • Kevlar
  • PHBV
  • Glyptal
  • Bakelite
Formation of polyethylene from calcium carbide taken place as follows:

$$CaC_2+2H_2O\rightarrow Ca(OH)_2+C_2H_2$$
$$C_2H_2+H_2\rightarrow C_2H_4$$
$$nC_2H_4\rightarrow (CH_2-CH_2)n$$

The amount of polyethylene obtained from 64.0 kg of $$CaC_2$$ is:
  • 27 kg
  • 24 kg
  • 22 kg
  • 28 kg
The structure of the polymer obtained by the following reaction is:
631412_b67c9813a6374e3e9d9f6ed6cc769b19.jpg
  • I
  • II
  • III
  • IV
The monomers of Buna-S rubber are:
  • vinyl chloride and sulphur
  • butadiene
  • styrene and butadiene
  • isoprene and butadiene
Soft drink and baby feeding bottles are generally made up of:
  • Polyester
  • Polyurethane
  • Polyurea
  • Polystyrene
In the reaction sequence, $$X$$ is:
654827_6cf689c9a064456fa4cc55421c686c57.png
  • cyclohexanone
  • caprolactam
  • $$HO(CH_2)_6NH_2$$
  • hexamethyline disocyanate
Which of the following is fully fluorinated polymer?
  • Neoprene
  • Teflon
  • Thiokol
  • PVC
Bakelite is formed by the reaction of:
  • phenol and formaldehyde
  • formaldehyde and aniline
  • adipic acid and ethylene glycol
  • phthalic acid and ethylene glycol
Arrange the following monomers in order of decreasing ability to undergo cationic polymerisation.
I. $$CH_2=CH-C_6H_4(NO_2)$$
II.$$CH_2=CH-C_6H_4(CH_3)$$
III.$$CH_2=CH-C_6H_4(OCH_3)$$
  • $$I > II > III$$
  • $$II > I > II$$
  • $$III > II > I$$
  • $$I > III > II$$
Novolac on heating with formaldehyde undergoes _______ to form an infusible solid mass called _______.
  • polymerization, melamine
  • vulcanization, resin
  • cross-liking, bakelite
  • condensation, polystyrene
In which of the following polymers, ethylene glycol is one of the monomer units?
  • $$(\!\!\!\!-CH_2 - CH_2 -\!\!\!\!)_n$$
  • $$[\!\!\!- O - \underset{CH_3}{\underset{|\,\,\,\,\,}{CH}} - CH_2 - \underset{O}{\underset{||}{C}} - O - \underset{\,\,\,\,\,CH_2CH_3}{\underset{|\,\,\,\,\,\,}{CH}} - CH_2 - \underset{O}{\underset{||}{C}} -\!\!\!]_n$$
Match the column I with column II and mark the appropriate choice.
Column IColumn II
(A)PVC(i)Rubber
(B)Condensation polymer(ii)Thermoplsatic
(C)Polysaccharide(iii)Dacron
(D)Elastomer(iv)Natural Polymer
  • (A) $$\rightarrow$$ (ii), (B) $$\rightarrow$$ (iii), (C) $$\rightarrow$$ (iv), (D) $$\rightarrow$$ (i)
  • (A) $$\rightarrow$$ (i), (B) $$\rightarrow$$ (ii), (C) $$\rightarrow$$ (iv), (D) $$\rightarrow$$ (iii)
  • (A) $$\rightarrow$$ (iii), (B) $$\rightarrow$$ (iv), (C) $$\rightarrow$$ (i), (D) $$\rightarrow$$ (ii)
  • (A) $$\rightarrow$$ (iv), (B) $$\rightarrow$$ (i), (C) $$\rightarrow$$ (iii), (D) $$\rightarrow$$ (ii)
Synthetic rubbers are usually obtained by copolymerisation of:
  • styrene and $$1, 3$$ - butadiene
  • $$1, 4$$ - polyisoprene
  • urea and formaldehyde
  • alkane and $$1, 3 $$ - butadiene
The difference in the densities of low-density (LDP) and high-density polymers (HDP) is due to the fact that:
  • LDP are highly branched structures while HDP consists of closely packed linear molecules
  • LDP are linear chains while HDP are branched chains of polythene
  • both LDP and HDP are unbranched linear chains with different lengths
  • at high temperature, the density of polymer is reduced
Which one of the following is a condensation polymer?
  • PVC
  • Teflon
  • Dacron
  • Polystyrene
Natural rubber or raw rubber consists of basic material latex which is a dispersion of isoprene. During the treatment, this isoprene forms a high molecular weight polymer of isoprene. Natural rubber can be obtained from five hundred different species of plants.
Which rubber is not a polydiene?
  • Polyisoprene
  • Polychloroprene
  • Thiokal rubber
  • Nitrile rubber
Which of the following is a natural polymer?
  • Polyester
  • Glyptal
  • Starch
  • Nylon-6
Match the column I with column II and mark the appropriate choice.
Column IColumn II
(A)Buna-N(i)Phthalic acid and ethylene glycol
(B)Nylon-6,6(ii)Terephthalic acid and ethylene glycol
(C)Dacron
(iii)Hexamethylenediamine and adipic acid
(D)Glyptal plastic(iv)Acrylonitrile and butadiene 
  • (A) $$\rightarrow$$ (ii), (B) $$\rightarrow$$ (iii), (C) $$\rightarrow$$ (iv), (D) $$\rightarrow$$ (i)
  • (A) $$\rightarrow$$ (i), (B) $$\rightarrow$$ (ii), (C) $$\rightarrow$$ (iv), (D) $$\rightarrow$$ (i)
  • (A) $$\rightarrow$$ (iii), (B) $$\rightarrow$$ (iv), (C) $$\rightarrow$$ (i), (D) $$\rightarrow$$ (ii)
  • (A) $$\rightarrow$$ (iv), (B) $$\rightarrow$$ (iii), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (i)
The monomers of biodegradable polymer, nylon 2-nylon 6 are:
  • glycine + adipic acid
  • glycol + phthalic acid
  • phenol + urea
  • glycine + amino caproic acid
Match the polymers given in column I with monomers in column II and mark the appropriate choice.

936957_d1a78ddd41534399be71aba52b59b7fc.png
  • (A) $$\rightarrow$$ (iv), (B) $$\rightarrow$$ (ii), (C) $$\rightarrow$$ (i), (D) $$\rightarrow$$ (iii)
  • (A) $$\rightarrow$$ (i), (B) $$\rightarrow$$ (iii), (C) $$\rightarrow$$ (iv), (D) $$\rightarrow$$ (ii)
  • (A) $$\rightarrow$$ (iv), (B) $$\rightarrow$$ (i), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (iii)
  • (A) $$\rightarrow$$ (ii), (B) $$\rightarrow$$ (iv), (C) $$\rightarrow$$ (iii), (D) $$\rightarrow$$ (i)
Nylon-$$6$$ is prepared by linear condensation homopolymerization reaction of: 
  • caprolactum
  • hexamethylene diamine and adipic acid
  • $$6$$-aminohexanoic acid
  • acrylonitrile
Which monomer is responsible for the flexibility property in $$PHBV$$?
  • $$HO -\underset {\underset {CH_{3}}{|\,\,\,\,}}{CH} - CH_{3} - COOH$$
  • $$HO - \underset {\underset {\,\,\,\,\,\,\,\,CH_{2} - CH_{3}}{|\,\,\,\,}}{CH} - CH_{2} - COOH$$
  • $$HO - \underset {\underset {CH_{3}}{|\,\,\,\,\,}}{CH} - CH_{2} - CH_{2} - COOH$$
  • $$HO - \underset {\underset {\,\,\,\,\,\,\,CH_{2} -CH_{3}}{|\,\,\,\,\,\,}}{CH} - CH_{2} - CHO$$
Identify X and Y in the given polymerization reactions :

936952_8214508e796542ea83f79dd306a06f48.png
  • X = Bakelite, Y = Novolac
  • X = Novolac, Y = Melamine
  • X = Bakelite, Y = Malamine
  • X = Novolac, Y = Bakelite
The monomer that undergo radical polymerisation most easily is?
  • $$CH_2=CH_2$$
  • $$C_6H_5CH=CH_2$$
  • $$CH_2=C{(Me)}_2$$
  • $$CH_3-CH=CH_2$$
Which polymer is matched with incorrect use?
  • High density polythene $$-$$ Buckets, pipes
  • Nylon 6,6 $$-$$ Ropes, bristles for brushes
  • Orlon $$-$$ Synthetic wool, carpets
  • Glyptal $$-$$ Electrical switches, combs
Which of the following polymer is biodegradable?
  • $$-\!\!\!(CH_2-\underset{Cl}{\underset{|}{C}}=CH-CH_2)\!\!\!-_n$$
  • $$-\!\!\!(CH_2-CH=CH-CH_2-CH_2-\overset{CN}{\overset{|}{CH}})\!\!\!-_n$$
  • $$-\!\!\!(O-\underset{CH_3}{\underset{|}{CH}}-CH_2-\underset{O}{\underset{||}{C}}-O-\underset{CH_2CH_3}{\underset{|}{CH}}-CH_2-\underset{O}{\underset{||}{C}})\!\!\!-_n$$
  • $$-\!\!\!(\overset{H}{\overset{|}{N}}-(CH_2)_6-\overset{H}{\overset{|}{N}}-\overset{O}{\overset{||}{C}}-(CH_2)_4-\overset{O}{\overset{||}{C}})\!\!\!-_n$$
Which one of the following is an elastomer?
The copolymer formed by addition polymerization of styrene and acrylonitrile in the presence of peroxide is:
0:0:1


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