Buna-S, polythene and nylon 6,6 are arranged in increasing order of intermolecular forces. The correct order is

ABuna-S < polythene < nylon 6,6
Bpolythene < Buna-S < nylon 6,6
Cnylon 6,6 < polythene < Buna-S
DBuna-S < nylon 6,6 < polythene

Answer: A

Buna-S is an elastomer (weakest forces), polythene is a thermoplastic with van der Waals forces, and nylon 6,6 is a fibre with strong hydrogen bonding between amide groups.

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