Nylon-6,6 is a polyamide obtained by the reaction of

1. $\mathrm{COOH}({\mathrm{CH}}_2{)}_4\mathrm{COOH}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{H}}_2{\mathrm{NC}}_6{\mathrm{H}}_4{\mathrm{NH}}_2<mspace\; width="1em"></mspace>-<mspace\; width="1em"></mspace>(p)$

2. $\mathrm{COOH}({\mathrm{CH}}_2{)}_4\mathrm{COOH}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{NH}}_2({\mathrm{CH}}_2{)}_6{\mathrm{NH}}_2<mspace\; width="1em"></mspace>$

3. $\mathrm{COOH}({\mathrm{CH}}_2{)}_4\mathrm{COOH}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{NH}}_2({\mathrm{CH}}_2{)}_4{\mathrm{NH}}_2<mspace\; width="1em"></mspace>$

4. ${\mathrm{COOHC}}_6{\mathrm{H}}_4\mathrm{COOH}<mspace\; width="1em"></mspace>-<mspace\; width="1em"></mspace>\left(p\right)<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{NH}}_2({\mathrm{CH}}_2{)}_6{\mathrm{NH}}_2$

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

Melamine plastic crockery is a copolymer of:

1. HCHO and melamine

2. HCHO and ethylene

3. Melamine and ethylene

4. none of the above

Terylene is a condensation polymer of ethylene glycol and

1. Benzoic acid

2. Phthalic acid

3. Salicylic acid

4. Terephthalic acid

Bakelite is prepared by the reaction between

1. urea and formaldehyde

2. ethylene glycol

3. phenol and formaldehyde

4. tetramethylene glycol

$-\left[\mathrm{NH}{\left({\mathrm{CH}}_2\right)}_6\mathrm{NHCO}{\left({\mathrm{CH}}_2\right)}_4\mathrm{CO}\right]{-}_n$ is a -

1. Copolymer.

2. Addition polymer.

3. Thermo-setting polymer.

4. Homopolymer.

Which of the following natural products is not a polymer ?

1. DNA

2. Cellulose

3. ATP

4. Urease

Which one is protein fibre ?

1. Cotton

2. Rayon

3. Silk

4. Polyster

Synthetic human hair wigs are made from a copolymer of vinyl chloride and acrylonitrile and is called:

1. PVC

2. polyacrylonitrile

3. cellulose

4. dynel