Chapter 28

Low density polythene is prepared by (a) Free radical polymerization (b) Cationic polymerization (c) Anionic polymerization (d) Ziegler-Natta polymerization

A copolymer of acrylonitrile and 1,3 -butadiene is called \(\begin{array}{llll}\text { [ar Buna-N } & \text { (b) Polystrene } & \text { (c) Neoprene } & \text { (d) Buna-S }\end{array}\)

Which of the following polymers has ester linkages ? (a) Nylon (b) Bakelite (c) Terylene (d) \(\mathrm{PVC}\)

Polymerization of caprolactam yields (a) Terylene (b) nylon-6 (c) nylon-66 (d) bakelite

Which of the following polymers has amide linkages ? (a) Nylon (b) Bakelite (c) Terylene (d) PVC

Which of the following is a chain-growth polymer ? (a) Orlon (b) Terylene (c) Nylon-6 (d) Glyptal

Natural rubber is (a) Polyvinyl chloride (b) cis-Polyisoprene (c) Trans-Polyisoprene (d) Polychloroprene

Gutta percha is (a)' Trans-polyisoprene (b) A synthetic polymer (c) A very hard material (d) All statements are correct.

Amongst the following, a homopolymer is (a) Nylon \(\begin{array}{llll}\text { (b) Bakelite (c) Polythene (d) } & \text { Dacron }\end{array}\)

The monomers of Buna-S polymers are (a) Vinyl chloride and vinylidene (b) Styrene and butadiene (c) Acrylonitrile and butadiene (d) Isobutylene and isoprene

Amongst the following, the branched chain polymer is (a) PVC (b) Polyester (c) Low density polythene (d) Nylon-66

The \(\mathrm{S}\) in Buna-S stands for (a) Sodium (b) Sulphur (e) Styrene (d) Just a trade name

Formation of polyethylene from calcium carbide takes place as follows: \(\mathrm{CaC}_{2}+2 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{C}_{2} \mathrm{H}_{2}\) \(\mathrm{C}_{2} \mathrm{H}_{2}+\mathrm{H}_{2} \rightarrow \mathrm{C}_{2} \mathrm{H}_{4}\) \(n \mathrm{C}_{2} \mathrm{H}_{4} \rightarrow\left(-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\right)_{n}\) the amount of polyethylene obtained from \(64.1 \mathrm{~kg}\) of \(\mathrm{CaC}_{2}\) is (a) \(7 \mathrm{~kg}\) (b) \(14 \mathrm{~kg}\) (c) \(21 \mathrm{~kg}\) (d) \(28 \mathrm{~kg}\)

Which of the following is a polyámide ? (a) Teflon (b) Nylon-6,6 (c) Terylene (d) Bakelite

Polymer used in bullet proof glass is (a) PMMA (b) Lexan (c) Nomex (d) Kevlar

Which one of the following is used to make 'nonstick' cookware ? (a) PVC (b) Polystyrene (c) Poly(ethylene terephthalate) (d) Polytetrafluoroethylene

Ziegler-Natta catalyst is (a) \(\mathrm{K}\left[\mathrm{P}_{1} \mathrm{Cl}_{3}\left(\mathrm{C}_{2} \mathrm{H}_{4}\right)\right]\) (b) \(\left(\mathrm{Ph}_{3} \mathrm{P}\right)_{3} \mathrm{RhCl}\) (c) \(\mathrm{Al}_{2}\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{6}+\mathrm{TiCl}_{4}\) (d) \(\mathrm{Fe}\left(\mathrm{C}_{3} \mathrm{H}_{5}\right)_{2}\)

Nylon threads are made of (a) Polyvinyl polymer (b) Polyester polymer (c) Polyamide polymer (d) Polyethylene polymers

Which of the following is a biodegradable polymer ? (a) PVC (b) Nylon-6 (c) Cellulose (d) Polythene

\(\mathrm{F}_{2} \mathrm{C}=\mathrm{CF}_{2}\) is a monomer of (a) Teflon (b) Glyptal (c) Nylon-6 (d) Buna-5

Which of the following is a cross-linked polymer? (a) Teflon (b) Orlon (c) Nylon (d) Bakelite

Non-stick cookwares generally have a coating of a polymer, whose monomer is following organic compound (a) \(\mathrm{CH}_{2}=\mathrm{CH}_{2}\) (b) \(\mathrm{CH}_{2}=\mathrm{CHCN}\) (c) \(\mathrm{CH}_{2}=\mathrm{CHCl}\) (d) \(\mathrm{CF}_{2}=\mathrm{CF}_{2}\)

If \(30 \%\) molecules have \(M=20,000,40 \%\) molecules have \(M=30.000\), rest of them have \(M\) \(=60,000\), calculate PDI. (a) \(0.83\) (b) \(1.45\) (c) \(0.98\) (d) \(1.20\)

Gutta Percha is a polymer related to the following (a) Proteins (b) Cellulose (c) Rubber (d) \(\mathrm{PVC}\)

Which of the following is a polymer having one of its manomers as sebacic acid (a) Nylon 6 (b) Nylon 6, 6 (c) Nylon 6, 10 (d) all of these

Which of the following has a polyester linkage ? (a) Nylon 6, 6 (b) PAN (e) Glyptal (d) Bakelite

Which of the following polymers has the following organic compound as one of its manomers ? Nc1nc(N)nc(N)n1 (a) Bakelite (b) Melamine (c) Nylon 6 (d) MIIIV

Which of the following is not a biodegradable polymer ? (a) \(\mathrm{FC} \mathrm{L}\). (b) \(\mathrm{PGA}\) (c) \(\mathrm{PI} \mathrm{A}\) (d) PMMA

Which of the following has a polyamide linkage ? (a) Nylon 6, 6 (b) \(\underline{\text { PAN }}\) (c) Glyptal (d) Bakelite

Which of the following polymers involves Lederer Menese Reaction in its formation? (a) Melamine (b) PVC (c) Bakelite (d) orlon

Beckman Rearrangement is involved in the synthesis of one of the following polymers (a) PAN (b) Nylon 6,10 (c) Nylon 6 (d) Melamine

What is not true for High Density Polythene? (a) Melting point higher than LDPE. (b) Tensile strength higher than LDPE (c) Prepared in the presence of traces of \(\mathrm{O}_{2}\) (d) Linear molecules closely packed in space