Polymers Test -...

Which of the following is copolymer?

Statement 1: Bakelite is hard and has high melting point.

Silk clothes are prepared from silkworms at which of the following stage of its cycle?

$$\begin{bmatrix}-CH_2-\underset{\underset{\textstyle\;OH}{\displaystyle\mid}}{\;\;\;CH}-CH_2-\underset{\underset{\textstyle\;OH}{\displaystyle\mid}}{\;\;\;CH}-CH_2-\underset{\underset{\textstyle\;OH}{\displaystyle\mid}}{\;\;\;CH}-\end{bmatrix}_n$$

Which of the following is the biodegradable polymer of polyamide class ?

The formation of polyethylene from calcium carbide takes places as follows :
$$CaC_2 + 2H_2O \rightarrow Ca(OH)_2+C_2H_2$$
$$C_2H_2+H_2\rightarrow C_2H_4$$
$$nC_2H_4\rightarrow (CH_2-CH_2)_n$$
The amount of polyethylene obtained from $$64$$ kg of $$CaC_2$$ is :

Which of the following is not correctly matched?

Statement 1: Polybutadiene is an example of step growth polymer.
Statement 2: Copolymerisation of butadiene and acrylonitrile gives Buna-N.

Which of the following sets contains only co-polymers ?

Statement 1: Teflon has high thermal stability and chemical inertness.