A polymer of prop-2-ene nitrile is called

(1) Tetron

(2) Saran

(3) Orlon

(4) Dacron

Monomers that are used in the manufacture of 'Dacron' are: 

(1) Acrylonitrile and vinyl acetate

(2) Terephthalic acid and ethylene glycol

(3) Phthalic acid and ethylene glycol

(4) Adipic acid and hexamethylene diamine

Consider the following sequence of reactions.

The polymer (Y) is -

1. PVC

2. Saran

3. Neoprene

4. Chloroprene

The chemical name of 'Melamine' is:

1. l, 3, 5-Triamine-2, 4, 6-triazine

2. 2, 4, 6-Triamine-l, 3, 5-triazine

3. 2-Amino-l, 3, 5-triazine

4. 2, 4-Diamino-l, 3, 5-triazine

Peroxide initiated polymerizations occur via -

1. Hydrocarbon combustion 

2. Natural process synthesis

3. Isomeric saponification

4. Free radical chain propagation

Which of the following statèment is incorrect?

(1) Vinyon is a copolymer of vinyl chloride and vinyl acetate

(2) Saran is a copolymer of vinyl chloride and vinylidene chloride

(3) Butyl rubber is a copolymer of isobutylene and isoprene

1.  1 and 2

2.  2 only

3.  1 only

4.  none is incorrect

The thermoplastic polymer among the following is -

1. Bakelite

2. Urea-formaldehyde resin

3. PVC

4. Melamine-formaldehyde resin

Latex can be coagulated with?

(1) ${\mathrm{CH}}_2\mathrm{COOH}$

(2) ${\mathrm{H}}_2\mathrm{O}$

(3) ${\mathrm{CH}}_3\mathrm{OH}$

(4) All of these

Which one of the following pairs is not correctly matched?

(1) Teflon: Thermally stable cross-linked polymer of phenol and formaldehyde

(2) Synthetic rubber: A copolymer of butadiene and styrene

(3) Terylene: Condensation polymer of terephthalic acid and ethylene glycol

(4) Perspex: A homopolymer of methyl methacrylate

In a polymer sample, 30% of molecules have a molecular mass of 20,000, 40% have 30,000, and the rest- 60,000. What is the weight average molecular mass= of the polymer?

(1) 40,300

(2) 30,600

(3) 43,333

(4) 50,400