Which polymer is used for making magnetic recording tapes?

Given $A = \text{Nylon-}6,6$,$B = \text{Buna-}S$,and $C = \text{Polythene}$. Arrange these polymers in the increasing order of their intermolecular forces (from weakest to strongest).

Name the polymer used in the manufacturing of rayon.

Terylene is a

Intermolecular forces in nylon-$6,6$ are

Which of the following is not a polyester polymer?