Thermoplastics are:

1. linear polymers

2. soften or melt on heating 

3. molten polymer can be moulded in desired shape

4. all of the above

$-\left[NH{\left(C{H}_2\right)}_{6}NHCO{\left(C{H}_2\right)}_{4}CO\right]{-}_n$ is a 

[2006]

1.  Copolymer 

2.  additional polymer 

3. thermo-setting polymer 

4.  homopolymer 

Nylon-66 is a polyamide obtained by the reaction of

(1) $\mathrm{COOH}({\mathrm{CH}}_2{)}_4\mathrm{COOH} + {\mathrm{H}}_2{\mathrm{NC}}_6{\mathrm{H}}_4{\mathrm{NH}}_2 - (p)$

(2) $\mathrm{COOH}({\mathrm{CH}}_2{)}_4\mathrm{COOH} + {\mathrm{NH}}_2({\mathrm{CH}}_2{)}_6{\mathrm{NH}}_2$

(3) $\mathrm{COOH}({\mathrm{CH}}_2{)}_4\mathrm{COOH} + {\mathrm{NH}}_2({\mathrm{CH}}_2{)}_4{\mathrm{NH}}_2$

(4) ${\mathrm{COOHC}}_6{\mathrm{H}}_4\mathrm{COOH} - \left(p\right) + {\mathrm{NH}}_2({\mathrm{CH}}_2{)}_6{\mathrm{NH}}_2$

Bakelite is prepared by the reaction between :

1. Urea and formaldehyde.

2. Ethylene glycol.

3. Phenol and formaldehyde.

4. Tetramethylene glycol.

Terylene is a condensation polymer of ethylene glycol and

(1) Benzoic acid

(2) Phthalic acid

(3) Salicylic acid

(4) Terephthalic acid

Melamine plastic crockery is a copolymer of:

1. HCHO and melamine

2. HCHO and ethylene

3. Melamine and ethylene

4. None of the above

The correct structure of acrilan is: 

1. ${\left(-{\mathrm{CH}}_2-\underset{{\mathrm{COOC}}_2{\mathrm{H}}_5}{\underset{|}{\mathrm{CH}}}-\right)}_n$

2. ${\left(-{\mathrm{CH}}_2-\underset{\mathrm{Cl}}{\underset{|}{\mathrm{CH}}}-\right)}_n$

3. ${\left(-{\mathrm{CH}}_2-\underset{\mathrm{CN}}{\underset{|}{\mathrm{CH}}}-\right)}_n$

4. ${\left(-{\mathrm{CH}}_2-\underset{{\mathrm{COOCH}}_3}{\underset{|}{\stackrel{{\mathrm{CH}}_3}{\stackrel{|}{\mathrm{C}}}}}-\right)}_n$

Of the following which one is classified as polyester polymer ?

(1) Bakelite

(2) Melamine

(3) Nylon-66

(4) Terylene

Monomer of neoprene is: 

(1) 

(2) ${\mathrm{CF}}_2={\mathrm{CF}}_2$

(3) ${\mathrm{CH}}_2=\mathrm{CHCl}$

(4) ${\mathrm{CCl}}_2={\mathrm{CCl}}_2$

Monomer of  is 

(a) 2-methyl propene

(b) styrene

(c) propylene

(d) ethene