Which one is protein fibre ?

1. Cotton

2. Rayon

3. Silk

4. Polyster

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

Acrilan is a hard,  wool-like feel 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. ${\left(-{\mathrm{CH}}_2-\underset{{\mathrm{COOCH}}_3}{\underset{|}{\stackrel{{\mathrm{CH}}_3}{\stackrel{|}{\mathrm{C}}}}}-\right)}_n$

The polymer that can be classified as polyster polymer is : 

1. Bakelite

2. Melamine

3. Nylon-66

4. Terylene

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

1. natural rubber

2. teflon

3. nylon-6,6

4. polystyrene

Monomer of neoprene is: 

1. 

2. 

3. 

4. 

Which one of the following monomers gives the polymer neoprene on polymerization?

1. 

2. ${\mathrm{CF}}_2={\mathrm{CF}}_2$

3. ${\mathrm{CH}}_2=\mathrm{CHCl}$

4. ${\mathrm{CCl}}_2={\mathrm{CCl}}_2$

Structures of some common polymers are given. The incorrect representation among the following is: 

1. Teflon  

2. Neoprene 

3. Terylene  

4. Nylon-6,6