Same chapter3 marksDifficulty: Medium
What is denaturation of a protein, and what happens to its structure?
Biomolecules and Polymers
3 marksDifficulty: Medium
Distinguish between thermoplastic and thermosetting polymers, with one example of each.
Original Khojo Papers practice question — not from a past board paper.
Answer
A thermoplastic polymer has linear or slightly branched chains held by weak forces, softens on heating and can be remoulded repeatedly; polythene and PVC are examples. A thermosetting polymer is heavily cross-linked into a three-dimensional network, sets permanently on first heating and cannot be remoulded; bakelite is an example.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The difference is entirely one of cross-linking.
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Solutions