Problem 55
Which of the following is an elastomer? (a) Dacron (b) Melamine (c) vulcanized rubber (d) polystyrene
Problem 56
Natural silk is a (a) polychloroprene (b) polypeptide (c) polyacrylonitrile (d) polysaccharide
Problem 57
Synthetic rubber (neoprene) is (a) polyamide (b) polyester (c) poly halodiene (d) polysaccharide
Problem 58
A polymer of prop-2-ene nitrile is called (a) Tetron (b) Saran (c) Orlon (d) Dacron
Problem 59
Which one of the following pairs of monomers is used in the manufacture of 'Dacron'? (a) acrylonitrile and vinyl acetate (b) tetephthalic acid and ethylene glycol (c) phthalic acid and ethylene glycol (d) adipic acid and hexamethylene diamine
Problem 60
Which can be used as monomer in a polymerization reaction? (a) \(\mathrm{C}_{2} \mathrm{H}_{4}\) (b) \(\mathrm{C}_{2} \mathrm{H}_{6}\) (c) \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}\) (d) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{Cl}\)
Problem 61
Consider the following sequence of reactions. \(\mathrm{HC} \equiv \mathrm{CH} \stackrel{\text { (i) } \mathrm{CuCl}, \mathrm{NH}_{4} \mathrm{Cl}, \text { (ii) } \mathrm{HCl}}{\longrightarrow}(\mathrm{X})\) \(\underline{\text { Polymerization }}{\longrightarrow}(\mathrm{Y})\) The polymer (Y) is (a) PVC (b) Saran (c) Neoprene (d) Chloroprene
Problem 62
Which of the following is biodegradable polymer of polyamide class? (a) dextran (b) Nylon-2-Nylon-6 (c) Nylon-6, 6 (d) PHBV
Problem 63
Which of the following is chemical name of 'melamine'? (a) \(1,3,5\)-triamino- \(2,4,6\)-triazine (b) \(2,4,6\)-triamino- \(1,3,5\)-triazine (c) 2 -amino- \(1,3,5\)-triazine (d) 2,4 -diamino- \(1,3,5\)-triazine
Problem 65
Peroxide initiated polymerizations occur via (a) hydrocarbon combustion (b) natural process synthesis (c) isomeric saponification (d) free radical chain propagation
