The monomer of the polymer

 is :-

1.

2. ${\left({\mathrm{CH}}_3\right)}_2\mathrm{C}=\mathrm{C}{\left({\mathrm{CH}}_3\right)}_2$

3. ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CH}·{\mathrm{CH}}_3$

4. ${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CH}}_2$

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

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

Bakelite is prepared by the reaction between

1. urea and formaldehyde

2. ethylene glycol

3. phenol and formaldehyde

4. tetramethylene glycol