Ebonite is a .......

Nylon $6, 6$ is:

Nylon yarns are usually

If the number average molecular weight and weight average molecular weight of a polymer are $40000$ and $60000$ respectively, the polydispersity index of the polymer will be

Which one of the following is used in the preparation of cellulose nitrate?

Which of the following sets are correct regarding polymers?
$A$. Copolymer : $\text{Buna-}S$
$B$. Condensation polymer : $\text{Nylon-}6,6$
$C$. Fibre : $\text{Nylon-}6,6$
$D$. Thermosetting polymer : $\text{Terylene}$
$E$. Homopolymer : $\text{Buna-}N$
Choose the correct answer from the options given below.