POLYMERS

Very Short Question Answers

Q1. Define the terms monomer and polymer.

Q2. What are polymers? Give example.

Q3. What is polymerization? Give an example of polymerization reaction.

Q4. Give one example each for synthetic and semi-synthetic polymers.

Q5. How are the polymers classified on the basis of structure?

Q6. Give one example each for linear and branched chain polymers.

Q7. What are cross linked (or network) polymers ? Give example.

Q8. What is addition polymer? Give example.

Q9. What is condensation polymer? Give example.

Q10. What are homopolymers? Give example.

Q11. What are copolymers? Give example.

Q12. Is $\ce{ -[-CH2-CH(C6H5)-]_n-}$ a homopolymer or a copolymer?

Q13. Is $\ce{ (NH-CHR-CO)_n}$, a homopolymer or a copolymer?

Q14. What are the classes of the polymers based on molecular forces?

Q15. What are elastomers? Give example.

Q16. What are fibres? Give example.

Q17. What are thermoplastic polymers? Give example.

Q18. What are thermosetting polymers ? Give example.

Q19. Write the name and structure of one of the common initiators used in free radical polymerization reaction.

Q20. How can you differentiate between addition and condensation polymerization?

Q21. What is Ziegler-Natta catalyst?

Q22. How is Dacron obtained from ethylene glycol and terepthalic acid?

Q23. What are the repeating monomeric units of Nylon 6 and Nylon 6.6?

Q24. What is the difference between Buna-N and Buna-S?

Q25. Arrange the following polymers in increasing order of their molecular forces (i) Nylon 6,6, Buna-S, Polythene (ii) Nylon 6, Neoprene, Polyvinyl chloride

Q26. Identify the monomer in the following polymeric structures (i) $\ce{ -[-C-(CH2)8-C-NH-(CH2)6-NH-]-}$ (ii) $\ce{ -[-NH-CO-NH-CH2-]_n- }$

Q27. Name the different types of molecular masses of polymers.

Q28. What is PDI (Poly Dispersity Index)?

Q29. What is vulcanization of rubber?

Q30. What is the cross linking agent used in the manufacture of tyre rubber?

Q31. What is biodegradable polymer? Give one example of a blodegradable polyester?

Q32. What is PHBV? How is it useful to man?

Q33. Give the structure of Nylon 2- nylon 6?

Short Question Answers

Q1. Classify the following into addition and condensation polymers (i) Terylene (ii) Bakelite(iii) Polyvinyl chloride (iv) Polythene

Q2. How do you explain the functionality of a polymer?

Q3. Distinguish between the terms homo polymer and co polymer. Give one example of each.

Q4. Define thermoplastics and thermosetting polymers with two examples of each.

Q5. Explain copolymerization with an example.

Q6. Explain free radical mechanism for the polymerization of ethene.

Q7. Write the names and structures of the monomers used for getting the following polymers (1) Polyvinyl chloride (II) Teflon (iii) Bakelite (iv) Polystyrene.

Q8. Write the names and structures of the monomers of the following polymers (i) Buna-S (ii) Buna-N (iii) Dacron (iv) Neoprene.

Q9. What is natural rubber? How does it exhibit elastic properties?

Q10. Explain the purpose of vulcanization of rubber.

Q11. Explain the difference between natural rubber and synthetic rubber.

Q12. How does the presence of double bonds in rubber molecules influence their structure and reactivity?

Q13. What are LDP and HDP? How are they formed?

Q14. What are natural and synthetic polymers? Give two examples of each type.

Q15. Write notes on different types molecular masses of polymers.

Long Question Answers

Q1. Write an essay on (i) Addition polymerization and(ii) Condensation polymerization.

Q2. Explain the classification of polymers based on their source and structure.

Q3. Explain the classification of polymers based on the mode of polymerization and nature of molecular forces.

Q4. What are synthetic rubbers? Explain the preparation and uses of the following(i) Neoprene (ii) Buna-N (iii) Buna - S