Question

The characteristics of fibres is:

• A. It has strong intermolecular forces
• B. It has weak intermolecular forces
• C. They are heavily branched molecules
• D. It is capable of repeatedly softening on heating and hardening on cooling

Answer 1

The correct option is A

It has strong intermolecular forces

Fibres have strong intermolecular forces. Fibres are the thread forming solids which possess high tensile strength and high modulus. These characteristics can be attributed to the strong intermolecular forces like hydrogen bonding. These strong forces also lead to close packing of chains and thus impart crystalline nature. The examples are polyamides (nylon 6, 6), polyesters (terylene), etc.