Gutta parcha rubber is:

1. A trans-1,4-polyisoprene polymer

2. A very hard material

3. A synthetic polymer

4. All of the above

Perspex or plexiglass is a polymer of-

1. Methyl methylacrylate

2. Methylacrylate

3. Acrylonitrile

4. None of the above

Glyptal is polymer of:

1. Ethylene glycol and phthalic acid

2. Ethylene and phthalic acid

3. Phthalic acid and acetylene

4. None of the above

Polymerisation of chloroethylene gives the polymer:

1. Polythene

2. PVC

3. Teflon

4. NPylon

Nylon-6, 10 is a polymer of:

1. Hexamethylene and adipic acid

2. Hexamethylene and sebacic acid

3. Caprolactam

4. None of the above

The polymer containing strong intermolecular forces, e.g., hydrogen bonding is:

1. Natural rubber

2. Teflon

3. Nylon-6,6

4. Polystyrene

Acrilan is a hard, horny and a high melting material. Which of the following represents its structure ?

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

Melamine plastic crockery is a copolymer of:

1. HCHO and melamine.

2. HCHO and ethylene.

3. Melamine and ethylene.

4. None of the above.

Bakelite is prepared by the reaction between

1. Urea and formaldehyde

2. Ethylene glycol

3. Phenol and formaldehyde

4. Tetramethylene glycol

Which one is protein fibre ?

1. Cotton

2. Rayon

3. Silk

4. Polyster