91Ó°ÊÓ

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

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

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