Chapter 29

Which polymer has 'chiral' monomer(s)? [Main Jan. 09, 2020 (II)] (a) Neoprene (b) Buna-N (c) Nylon 6,6 (d) PHBV

Which one of the following polymers is not obtained by condensation polymerisation? [Main Sep. 05, 2020 (II)] (a) Nylon 6,6 (b) Buna - \(\mathrm{N}\) (c) Bakelite (d) Nylon 6

Preparation of Bakelite proceeds via reactions: [Main Jan. 08, 2020 (II)] (a) Electrophilic addition and dehydration (b) Condensation and elimination (c) Electrophilic substitution and dehydration (d) Nucleophilic addition and dehydration

Which of the following is a thermosetting polymer? [Main April 12, 2019 (I)] (a) Bakelite (b) Buns-N (c) Nylon 6 (d) PVC

Which of the following compounds is a constituent of the polymer CCNC(N)=O [April 9, 2019 (II)] (a) N-Methyl urea (b) Formaldehyde (c) Methylamine (d) Ammonia

Which of the following is a condensation polymer? [Main April 10, 2019 (I)] (a) Buna - S (b) Neoprene (c) Teflon (d) Nylon 6, 6

Poly- \(\square\)-hydroxybutyrate-co- \(\square\)-hydroxy valerate \((\mathrm{PHBV})\) is a copolymer of [Jan. 12, 2019 (I)] (a) 3-Hydroxybutanoic acid and 4-Hydroxypentanoic acid (b) 2-Hydroxybutanoic acid and 3-Hydroxypentanoic acid (c) 3-Hydroxybutanoic acid and 2-Hydroxypentanoic acid (d) 3-Hydroxybutanoic acid and 3-Hydroxypentanoic acid

The two monomers for the synthesis of nylon 6,6 are : [Main Jan. 12, 2019 (II)] (a) \(\mathrm{HOOC}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{COOH}, \mathrm{H}_{2} \mathrm{~N}\left(\mathrm{CH}_{2}\right)_{6} \mathrm{NH}_{2}\) (b) \(\mathrm{HOOC}\left(\mathrm{CH}_{2}\right)_{6} \mathrm{COOH}, \mathrm{H}_{2} \mathrm{~N}\left(\mathrm{CH}_{2}\right)_{6} \mathrm{NH}_{2}\) (c) \(\mathrm{HOOC}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{COOH}, \mathrm{H}_{2} \mathrm{~N}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{NH}_{2}\) \text { (d) } \mathrm{HOOC}\left(\mathrm{CH}_{2}\right)_{6} \mathrm{COOH}, \mathrm{H}_{2} \mathrm{~N}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{NH}_{2}

Which of the following polymers is synthesized using a free radical polymerisation technique? [Main Online April 10,2016] (a) Terylene (b) Melamine polymer (c) Nylon 6, 6 (d) Teflon

Which one is classified as a condensation polymer? \([\) Main \(\mathbf{2 0 1 4}]\) (a) Dacron (b) Neoprene (c) Teflon (d) Acrylonitrile

Which one of the following is an example of thermosetting polymers? [Main Online April 19, 2014] (a) Neoprene (b) Buna-N (c) Nylon 6, 6 (d) Bakelite

Which of the following polymer is a polyamide ? [Main Online April 23, 2013] (a) Terylene (b) Nylon (b) Rubber (d) Vulcanised rubber

Which of the following statements is not true? [Main Online April 15, \(\mathbf{2 0 1 8}\) (II)] (a) Chain growth polymerisation involves homopoly-merisation only (b) Chain growth polymerisation includes both homo-polymerisation and copolymerisation (c) Nylon 6 is an example of step-growth polymerisation (d) Step growth polymerisation requires a bifunctional monomer

Which of the following is a polyamide? [Main Online May 19, 2012, April 23, 2013] (a) Teflon (b) Orlon (c) Nylon (d) Terylene

The formation of which of the following polymers involves hydrolysis reaction? [Main 2017] (a) Nylon 6 (b) Bakelite (c) Nylon 6,6 (d) Terylene

Which of the following statements about low density polythene is FALSE? [Main 2016] (a) Its synthesis requires dioxygen or a peroxide initiator as a catalyst. (b) It is used in the manufacture of buckets, dust-bins etc. (c) Its synthesis requires high pressure. (d) It is a poor conductor of electricity.

On complete hydrogenation, natural rubber produces [Adv. 2016] (a) ethylene-propylene copolymer (b) vulcanised rubber (c) polypropylene (d) polybutylene

Which polymer is used in the manufacture of paints and lacquers? [Main 2015] (a) Polypropene (b) Polyvinyl chloride (c) Bakelite (d) Glyptal

Bakelite is obtained from phenol by reacting with: [Main Online April 25, 2013] (a) Acetal (b) \(\mathrm{CH}_{3} \mathrm{CHO}\) (c) \(\mathrm{HCHO}\) (d) Chlorobenzene

The polymer used for optical lenses is : [Main Online April 22, 2013] (a) polypropylene (b) polyvinyl chloride (c) polythene (d) polymethyl methacrylate

If a polythene sample contains two monodisperse fractions in the ratio 2: 3 with degree of polymerization 100 and 200 , respectively, then its weight average molecular weight will be : [Main Online April 9, 2013] (a) 4900 (b) 4600 (c) 4300 (d) 5200

Among cellulose, poly (vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is [2009S] (a) Nylon (b) Poly (vinyl chloride) (c) Cellulose (d) Natural rubber

Choose the correct option(s) from the following. [Adv. 2019] (a) Nylon-6 has amide linkages (b) Cellulose has only \(\square-D\)-glucose units that are joined by glycosidic linkages (c) Teflon is prepared by heating tetrafluoroethene in presence of a persulphate catalyst at high pressure (d) Natural rubber is polvisoprene containing trans alkene unito

The correct functional group \(X\) and the reagent/reaction conditions \(Y\) in the following scheme are $$ [\mathbf{2 0 1 1}-\mathbf{I I}] $$$\mathrm{X}-\left(\mathrm{CH}_{2}\right)_{4}-\mathrm{X} \frac{\text { (i) } \mathrm{Y}}{\mathrm{HOOC}-\left(\mathrm{CH}_{2}\right)_{4}-\mathrm{COOH}, \text { heat }}{\longrightarrow}\( Condensation polymer (a) \)\mathrm{X}=\mathrm{COOCH}_{3}, \mathrm{Y}=\mathrm{H}_{2} / \mathrm{Ni} / \mathrm{heat}\( (b) \)\mathrm{X}=\mathrm{CONH}_{2}, \mathrm{Y}=\mathrm{H}_{2} / \mathrm{Ni} / \mathrm{heat}\( (c) \)\mathrm{X}=\mathrm{CONH}_{2}, \mathrm{Y}=\mathrm{Br}_{2} / \mathrm{NaOH}\( (d) \)\mathrm{X}=\mathrm{CN}, \mathrm{Y}=\mathrm{H}_{2} / \mathrm{Ni} / \mathrm{heat}$

The correct match between Item-I and Item - II is: [Main Sep. 06, 2020 (II)] Item - I \(\quad\) Item - II (a) Natural rubber (I) 1,3 -butadiene \(+\) styrene (b) Neoprene (II) 1, 3-butadiene \(+\) acrylonitrile (c) Buna-N (III) Chloroprene (d) Buna-S (IV) Isoprene(a) \((\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{IV}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{II})\) (b) \((\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{IV}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{I})\) (c) \((\mathrm{A})-(\mathrm{IV}),(\mathrm{B})-(\mathrm{IIl}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{I})\) (d) \((\mathrm{A})-(\mathrm{IV}),(\mathrm{B})-(\mathrm{IIl}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{II})\)

Match the polymers in column - A with their main uses in column - B and choose the correct answer: [Main Online April 10, 2015]Column - A \(\quad\) Column - B (A) Polystrene (i) Paints and lacquers (B) Glyptal (ii) Rain coats (C) Polyvinyl chloride (iii) Manufacture of toys (D) Bakelite (iv) Computer discs (a) (A) - (ii), (B)- (i), (C) - (iii), (D) - (iv) (b) \((\mathrm{A})-(\mathrm{ii}),(\mathrm{B})-(\mathrm{iv}),(\mathrm{C})-(\mathrm{iii}),(\mathrm{D})-(\mathrm{i})\) (c) (A)- (iii), (B) - (iv), (C) - (ii), (D) - (i) (d) \((\mathrm{A})-(\mathrm{iii}),(\mathrm{B})-(\mathrm{i}),(\mathrm{C})-(\mathrm{ii}),(\mathrm{D})-(\mathrm{iv})\)

Match the chemical substances in Column I with type of polymers/type of bonds in Column II. [2007]Column I Column II (A) Cellulose (p) Natural polymer (B) Nylon-6,6 (q) Synthetic polymer (C) Protein (r) Amide linkage (D) Sucrose (s) Glycoside linkage

Consider the Assertion and Reason given below. Assertion (A) : Ethene polymerized in the presence of Ziegler Natta Catalyst at high temperature and pressure is used to make buckets and dustbins. Reason (R) : High density polymers are closely packed and are chemically inert. [Main Sep. 06, 2020 (I)]Choose the correct answer from the following : (a) (A) is correct but \((\mathbf{R})\) is wrong. (b) Both (A) and \((\mathrm{R})\) are correct but \((\mathbf{R})\) is not the correct explanation of (A). (c) Both (A) and \((\mathrm{R})\) are correct but \((\mathrm{R})\) is the correct explanation of (A). (d) (A) and (R) both are wrong.

Assertion : Rayon is a semisynthetic polymer whose properties are better than natural cotton. Reason : Mechanical and aesthetic properties of cellulose can be improved by acetylation. [Main Online April 9, 2016](a) Both assertion and reason are correct, but the reason is not the correct explantion for the assertion (b) Both assertion and reason are correct, and the reason is the correct explantion for the assertion (c) Assertion is incorrect statement, but the reason is correct. (d) Both assertion and reason are incorrect.