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Polymer technology
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of urea-formaldehyde resins. [other wrong options] [Discuss in forum] siloxane elastomers. polyamides. vinyl polymers. |
Q22 ⇒ Terylene is both(a) & (b) [other wrong options] [Discuss in forum] same as dacron a polyester neither (a) nor (b) |
Q23 ⇒ Hot drink (e.g, tea) cups are usually made of polystyrene [other wrong options] [Discuss in forum] polythene polypropylene PVC |
Q24 ⇒ Alkyd resin can not be used for making fibres [other wrong options] [Discuss in forum] plasticiser paint & varnish film forming materials |
Q25 ⇒ Bristles of tooth brushes are made of nylon-66 [other wrong options] [Discuss in forum] nylon-6 polystyrene PVC |
Q26 ⇒ Molecular weight of polymers are in the range of 102-107 [other wrong options] [Discuss in forum] 10 to 103 107-109 109-1011 |
Q27 ⇒ Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used for fibre making. [other wrong options] [Discuss in forum] for surface coating of automobiles & air crafts. as plasticiser for PVC & nitrocellulose. for film forming materials. |
Q28 ⇒ Buna-S is also known as SBR [other wrong options] [Discuss in forum] teflon PTFE polycrylates |
Q29 ⇒ In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer ? Bakelite (phenol formaldehyde) [other wrong options] [Discuss in forum] Polyester Polythene Nylon-6 |
Q30 ⇒ Vinyl flooring is done using __________ sheets. PVC [other wrong options] [Discuss in forum] polypropylene polythene polyvinyl acetate |
Q31 ⇒ Starting material for the production of SBR is both (a) & (b) [other wrong options] [Discuss in forum] ethyl alcohol ethylene neither (a) nor (b) |
Q32 ⇒ __________ is not a polyester fibre. Nylon [other wrong options] [Discuss in forum] Terylene Dacron Polyacrylonitrite |
Q33 ⇒ Branched chair polymers as compared to linear polymers have lower density. [other wrong options] [Discuss in forum] higher melting point. higher tensile strength. none of these. |
Q34 ⇒ Most of the plastics are safe to be used upto a maximum temperature of __________ °C. 150 [other wrong options] [Discuss in forum] 100 350 450 |
Q35 ⇒ Maximum consumption of polymers is in coating and films [other wrong options] [Discuss in forum] electrical insulation toys making packaging |
Q36 ⇒ __________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate. Leathery [other wrong options] [Discuss in forum] Fibrous Rubbery Hard |
Q37 ⇒ Which of the following polymers shows the highest anti-tacking properties ? Melamine formaldehyde resin [other wrong options] [Discuss in forum] Phenolic resin Epoxy resin Alkyd resin |
Q38 ⇒ Gutta parcha rubber is an isomer of natural rubber. [other wrong options] [Discuss in forum] soft & tacky at room temperature. a thermosetting resin. recovered by coagulation of rubber latex. |
Q39 ⇒ The generic chemical name for the class of polymers which are commerically known as nylons is polyamide [other wrong options] [Discuss in forum] polyolefins polyacrylate polyurathane |
Q40 ⇒ In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of cross linked polystyrene. [other wrong options] [Discuss in forum] phenol formaldehyde resins. polyesters. polyamides. |
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