Question

Assertion: The correct order of increasing molecular forces in the given polymers is : Buna-$S$, Polythene, Nylon-$6,6$.
Reason:The properties of polymers depend upon the molecular forces.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (B)

Elastomers (buna-$S$) have weakest intermolecuiar forces.
Fibres (nylon-$6,6$) have strong intermolecuiar forces. Thermoplastic polymers (polythene) have intermolecuiar forces intermediate between elastomers and fibres.