Chemistry Chapter 14 | 2nd Year

 Chapter 14 Notes | Chemistry 2nd Year

“Macromolecules”

1. The polymer chains may be linear branched or cross-linked.
2. A thermoplastic polymer is the one which can be softened and hardened by heatin and cooling respectively.
3. A themosetting polymer s one which becomes permanently hard on heating.
4. The polymerization polymer process involves addition and condensation reactions.
5. The fotmation of polyethene is an example of addition polymerization.
6. Nylon, a polyamide and terylene, a polyster, are example of condensation polymers.
7. Carbohydrates, proteins,fats and nuclei acids are natural macromolecules.
8. Carbohydrates are the most abundant biomolecules on earth. They are classified into monosaccharides, oligosaccharieds and polysaccharieds.
9. Proteins are the essintial components of all living odranisms. Tje are the polymersof amino acids.
10. Lipids are naturally occuring compounds of animal and plant origin and they are soluble in organic solvents. Fats and oils are the most importanct lipis found in nature.
11. Enzymes are proteins that catalyze chemical reactions in living organisms. They are very specific in their action.

See Also: Chemistry 2nd Year Paper Scheme 2021