Chemistry sem 1 question bank polymers
QUESTION BANK SEM. -I
POLYMERS
Questions
1. Define: (I) Monomer (ii) Polymer (iii) Degree of polymerization (iv) Homo polymers (v) Heteropolymer (vi) Inorganic polymer (vii) resin (viii) fabrication or moulding ix) plasticizer (x) plastic (xi) Elastomer (xii) compounding if plastic.
2. Discuss (I )Addition polymerization (ii) Condensation polymerization.
3. Distinguish between addition and condensation polymerization with suitable example
4. Discuss the relation between structure of polymer and elasticity.
5. What 3g1 transition temperature Discuss the parameters affecting the &glass transition Temperature. What is its significance?
6. Weight average molecular weight is higher than number-average molecular weightExplain.
7. Explain with examples conducting polymers.
8. Define the term functionality of monomers. Explain its significance with suitable examples.
9. Why is plasticizer used during moulding of plastics?
10. Why do all simple organic molecules do not produce polymers?
11) P is soft and flexible whereas bakelite is hard and brittle. G4e reason,
12. Natural rubber needs vulcanization. Give reason.
13. What are supramolecule? Give two examples and give the uses of supramolecules.
14. Discuss with a neat diagram the following:{i) Compression moulding (ii) Injection moulding (0) Transfer moulding (iv) Extrusion moulding.
15. Discuss the synthesis, properties and uses of Ci) Polyethylene (ii) Polymethylmethacry (iii) Phenolformaldehyde polymer (hi) Ureaformaldehyde polymer.
.
POLYMERS
Questions
1. Define: (I) Monomer (ii) Polymer (iii) Degree of polymerization (iv) Homo polymers (v) Heteropolymer (vi) Inorganic polymer (vii) resin (viii) fabrication or moulding ix) plasticizer (x) plastic (xi) Elastomer (xii) compounding if plastic.
2. Discuss (I )Addition polymerization (ii) Condensation polymerization.
3. Distinguish between addition and condensation polymerization with suitable example
4. Discuss the relation between structure of polymer and elasticity.
5. What 3g1 transition temperature Discuss the parameters affecting the &glass transition Temperature. What is its significance?
6. Weight average molecular weight is higher than number-average molecular weightExplain.
7. Explain with examples conducting polymers.
8. Define the term functionality of monomers. Explain its significance with suitable examples.
9. Why is plasticizer used during moulding of plastics?
10. Why do all simple organic molecules do not produce polymers?
11) P is soft and flexible whereas bakelite is hard and brittle. G4e reason,
12. Natural rubber needs vulcanization. Give reason.
13. What are supramolecule? Give two examples and give the uses of supramolecules.
14. Discuss with a neat diagram the following:{i) Compression moulding (ii) Injection moulding (0) Transfer moulding (iv) Extrusion moulding.
15. Discuss the synthesis, properties and uses of Ci) Polyethylene (ii) Polymethylmethacry (iii) Phenolformaldehyde polymer (hi) Ureaformaldehyde polymer.
.
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