Polymer that contains isoprene units is : 

(1) Natural rubber

(2) Nylon-6, 6

(3) Polyethylene

(4) Dacron

PVC as obtained after polymerization is -

1. Soft and pliable.

2. Hard, brittle, and transparent.

3. Hard and infusible.

4. None of the above.

The compound used in the manufacture of terylene is: 

1. Ethylene

2. Vinyl chloride

3. Ethylene glycol

4. Adipic acid

A polymer of methylene chloride and sodium polysulfide is?

(1) Thiokol

(2) Melamine

(3) Glyptal

(4) Perlon L

Which of the following is not made of polyamides?

(1) nylon

(2) natural silk

(3) wool

(4) artificial silk

The synthetic polymer prepared from caprolactam is known as -

(1) Teflon

(2) Nylon-6

(3) Nylon-610

(4) Terylene

Which one of the following is not an example of a chain-growth polymer?

(1) neoprene

(2) Buna-S

(3) PMMA 

(4) glyptal

Urethane is

1. ${\mathrm{H}}_2\mathrm{N} - \mathrm{X} \equiv \mathrm{N}$

2. ${\mathrm{H}}_2\mathrm{N} - \mathrm{C} - \mathrm{OH}$
$\left|\right|$
$\mathrm{O}$

3. $\mathrm{HO} - \mathrm{C} \equiv \mathrm{N}$

4. ${\mathrm{H}}_2\mathrm{N} - \mathrm{C} - {\mathrm{OC}}_2{\mathrm{H}}_5$
$\left|\right|$
$\mathrm{O}$

The copolymer from the given options is-

1. Nylon 6, 6

2. Polyethylene

3. PMMA

4. Nylon-6

${\mathrm{F}}_2\mathrm{C}$ $=$ ${\mathrm{CF}}_2$ is a monomer of -

1. Teflon

2. Glyptal

3. Nylon-6

4. Buna-S