Given th polymers,
`A =` Nylon-6,6, `B=` Buna-`S`, `C =` Polythene
Arrange these in decreasing order of their intermolecular forces:

Options

A. `A lt B lt C `
B. `B lt C lt A`
C. `B lt A lt C `
D. `C lt A lt B`

Answer

B

Explanation

Nylon-6,6 is fibre , thus it has strong intermolecular forces like H-bonding. Buna-S is an elestomer, thus it has weakest intermolecular forces. Polythene is a themoplastic polymer, thus the intemoleculer forces present in polythene are in between elastomers and fibres. Thus, the order of intermolecular forces is
`B lt C lt A`