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

Monomer of

${\left( {\mathrm{CH}}_3\right)}_{}$
$|$
$-\mathrm{C}-{\mathrm{CH}}_2$
$|$
${\mathrm{CH}}_3\mathrm{n}$ is

(1) 2-methylpropene

(2) styrene

(3) propylene

(4) ethene

Ebonite is

(1) Natural rubber

(2) Synthetic rubber

(3) Highly vulcanized rubber

(4) Polypropene

The turbidity of a polymer solution measures

(1) light transmitted by the solution

(2) light scattered by the solution

(3) a light absorbed by the solution

(4) none of these

Orlon has a unit of -

1. Glycol

2. Isoprene

3. Vinyl cyanide

4. Acrolein

The biodegradable polymer among the following is:

1. Cellulose

2. Nylon-6

3. Polythene

4. Polyvinylchloride

The substance used to harden the rubber for tire manufacture is

(1) ${\mathrm{CaC}}_2$

(2) wax

(3) carbon black

(4) 1, 3-butadiene