281.

Select the correct statement for thermoplastic polymer.

• It does not become soft on heating under pressure

• It cannot be remoulded

• It is either linear or branched chain polymer

• It is a cross- linked polymer.

The monomers used in preparation of dextron are

• lactic acid and glycollic acid

• 3-hydroxy butanoic acid and 3-hydroxy pentanoic acid

• styrene and 1, 3-butadiene

• hexamethylenediamine and adipic acid

The polymer used in making handles of cookers and frying pans is

• bakelite

• nylon-2-nylon-6

• orion

• polyvinyl chloride

Which one of the following monomers form biodegradable polymer?

• Urea and formaldehyde

• Ethylene glycol and terephthalic acid

• 3-hydroxybutanoic and 3-hydroxypentanoic acid

• Phenol and caproic acid

Novlac, the linear polymer used in paints is

• copolymer of 1,3-butadiene and styrene

• obtained by the polymerization of methyl methacrylate

• nitial product obtained in the condensation of phenol and formaldehyde in the presence of acid catalyst

• obtained by the polymerisation of caprolactam

Bullet proof helmets are made from

• lexan

• saran

• glyptal

• thiokol

A thermoplastic among the following is

• bakelite

• polystyrene

• terylene

• urea-formaldehyde resin

The monomers used for their preparation of nylon 2-nylon 6 is/are

• caprolactam

• alanine and amino caproic acid

• glycine and amino caproic acid

• hexamethylenediamine and adipic acid

Zeigler-Natta catalyst is used in the preparation of

• low density polythene

• high density polythene

• dacron

• teflon

Match List-I with List-II and select the correct answer using the codes given below

• 1 - E; 2 - C; 3 - B; 4 - A

• 1 - B; 2 - A; 3 - D; 4 - E

• 1 - D; 2 - C; 3 - B; 4 - A

• 1 - E; 2 - C; 3 - B; 4 - A