Toluene di-isocyanate is used to prepare

(1) polyamides

(2) polyurethanes

(3) polycarbonates

(4) polyesters

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

Which can be used as a monomer in a polymerization reaction?

1. ${\mathrm{C}}_2{\mathrm{H}}_4$

2. ${\mathrm{C}}_2{\mathrm{H}}_6$

3. ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Cl}$

4. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{Cl}$

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

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

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

Which of the following statement is correct?

(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 in a copolymer of isobutylene and isoprene

(4) all are correct