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

Which of the following are correct here?

(1) ABS plastic

(2) Contains three monomers

(3) A polymer of acrylonitrile, butadiene, and styrene

1. 1 and 2

2. 3 only

3.  2 only

4.  1, 2, and 3

Which is/are correct about PMMA here

(I) It is called plexiglass
(II) It is hard and transparent
(III) For its formation peroxide is used
(IV) It is co-polymer

(1) I, II

(2) II, III

(3) 1, IIl

(4) I, II, III, IV

Polyacrylonitrile, characterized by the  repeating unit is made from the monomer: 

1. ${\mathrm{CH}}_2=\mathrm{CHCN}$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CN}$

3. ${\mathrm{HOCH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$

4. ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CHCN}$

The monomer used for the manufacture of PVC is obtained by the addition of -

1. ${\mathrm{Cl}}_2$ to ethylene

2. ${\mathrm{Cl}}_2$ to acetylene

3. HCl to ethylene

4. HCl to acetylene in presence of ${\mathrm{Hg}}^{2+}$ salts

The number average molecular mass and mass average molecular mass of a polymer are respectively 30,000 and 40,000. The polydispersity index of the polymer is

1. < 1

2. > 1

3. 1

4. 0

$\left[\mathrm{NH}\right({\mathrm{CH}}_2\left)\mathrm{NHCO}\right({\mathrm{CH}}_2{)}_4\mathrm{CO}]\mathrm{n}\text{ is a }$

(1) thermosetting polymer

(2) homopolymer

(3) co-polymer

(4) addition polymer