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

True statements regarding polymers are: 

a. Polymers have a low molecular weight.

b. Polymers have high viscosity.

c. Polymers scatter light.

d. Polymers do not carry any charge.

1. a, b and c

2. a, b and d

3. b, c and d

4. a, c and d

Which of the following is not correctly matched?

(1) Nylon-6, 6

${\left( \mathrm{O}\right)}_{}$
$\left|\right|$
$-\mathrm{NH}-({\mathrm{CH}}_2{)}_6-\mathrm{NH}-\mathrm{CO}-({\mathrm{CH}}_2{)}_4-\mathrm{C}-n$

(2) Neoprene

${\left({\mathrm{CH}}_2 - \mathrm{C} = \mathrm{CH} - {\mathrm{CH}}_2 -\right)}_{}$
$|$
$\mathrm{Cl}\mathrm{n}$

(3) PMMA

(4)Terylene

Which /are correct about spandex?

(I) It is a polyurethane
(II) It is a flexible polymer
(III) It is a polymer of toluene 2, 6 di isocyanates, and glycol
(IV) lt is a polymer of ammonium carbamate

(1) I, II, III

(2) I, II, IV

(3) III, II, IV 

(4) I, II, III, IV

Polymers that involve cross-linkages are: 

(I) Bakelite                
(II) High density Polythene
(III) PVC
(IV) Vulcanised rubber

(1) I, II, IV

(2) II only

(3) III, IV

(4) I, IV

Incorrect statement regarding the polymers is: 

(1) They all have a repeating structural unit.

(2) They have high viscosity.

(3) They scatter light.

(4) They have low molecular weights.

Which of the following compounds not contain amide linkage/group?

(1) Acetamide

(2) Nylon-6

(3) Cellulose

(4) Proteins

Which of the following are biopolymers?

(a) Leather

(b) Nucleic acids

(c) Orlon

(d) Bakelite

1. a,b

2.a,b,c

3.b

4.a