On the basis of mode of formation, polymers can be classified as:
1. Addition polymers only.
2. Condensation polymers only.
3. Co-polymers.
4. Both addition and condensation polymers.

Low-density polythene is prepared by -

1. Free-radical polymerization.

2. Cationic polymerization.

3. Anionic polymerization.

4. Ziegler-Natta polymerization.

The copolymer from the given options is-

1. Nylon 6, 6

2. Polyethylene

3. PMMA

4. Nylon-6

An example of elastomer among the following is: 

1. Dacron

2. Melamine

3. Vulcanized rubber

4. Polystyrene

The thermoplastic polymer among the following is -

1. Bakelite

2. Urea-formaldehyde resin

3. PVC

4. Melamine-formaldehyde resin

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

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

The polymer that can't be prepared by condensation polymerization is : 

1. Dacron

2. Nylon-6

3. Glyptal

4. PTFE

Match the polymers given in Column-I with their repeating units given in Column-II. Choose the correct option from the codes given below :

Column-I	Column-II
(a) Polystyrene	(p)
(b) Novolac	(q)
(c) Buna-N	(r)
(d) Acrilan	(s)

Match the polymer of Column I with the correct monomer of Column II

Codes