Which one of the following is a polyamide polymer?

The condensation reaction of hexamethylenediamine and adipic acid at $553 \ K$ under a nitrogen atmosphere for $4$ to $5$ hours yields which of the following products?

Which of the following is a condensation polymer?

Which polymer from the following is used as synthetic leather?

The number average molecular mass $(M_n)$ and weight average molecular mass $(M_w)$ of a polymer are $30000$ and $40000$ respectively. The polydispersity index $(PDI)$ of the polymer is:

During the vulcanization of rubber,natural rubber is heated with sulphur and some other additive to: