CBSE Guess > Papers > Important Questions > Class XII > 2007 > Chemistry > Polymers

Polymers

1 MARK QUESTION

1. What arepolymers?
2. Whatis polimerisation?
3. How are they classified on the basis of (I) structure (II) ynthesis & (III) Molicular forces are involved? Give one example of each.
4. Difine homopolymersa and coplymer?
5. Give example of eachho homopolymer or acolymer?
6. Is (--NH-CHR-CO)n ahomopolymer or a copolymer?
7. What is the difference betweeen homopolymer &copolymer?
8. Define the term
   [1] Elastomers
   [2] Fibres
   [3] Thermoplastic polymers .
   [4] Thermosetting polymer.
9. What is the monomer of natural rubber?
10. What is SBR ? write its properties and uses ?
11. D efine vulcaniza ions
12. What is PHBV
13. What PDT
14. Define number average weight average?
15. What are biopolymer ?
16. Write two example of biodegrable polymer?
17. Give two uses each .
    [1] polythene
    [2] PVC
    [3] PTFE
    [4] PMMA
    [5] ORTON
    [6] BUNA- S
    [7] BUNA-N
    [8] NYLONE
    [9] PHBV
    [10] POLYTHYLENE ACRYLATE
    [11] NEOPRENE
    [12] POYETHYL ACRYLATE
    [13] TERYLENE
    [14] NYLONE 66
    [15] GYPTAL
    [16] BAKELITE
    [17] UREA FORMALDEHYESION
    [18] NYLONE 6

2 MARKS QUESTIONS

1. Differentiate between addition & codensation polymerisation22 with suitable example?
2. Write the structure of a reagent used for initiating a free radical chain reaction.How does it act?
3. Why should one always use purest monomer in free radical polymerisation?
4. Give the preparation of nylon 66 ? &Give its type .
5. Describe 1,4-polymerzation of 1,3 butadiene
6. Describe 1,2polymerization of 1,3 butadiene
7. What are the main advantage of copolymers over homopolymers
8. How double bound in rubber molecule infrence this structure reacting?
9. How does vulcanization change the character of natural rubber?
10. Give the prepartion & two uses of the following
    [1] BAKALITE .
    [2] TERYLENE
    [3] TEFLON
    [4] NYLON 66
    [5] NYLON 6
    [6] MELAMINE
11. Name the monomer for the following polymer
    [1] PVC
    [2] PTFE
    [3] PMMA
    [4] DRLON
    [5] BUNA—5
    [6] BUNA—N
    [7] DACRM
    [8] PHBV
12. Explain the difference between polycraptes & polyesters
13. How is dayroom obtained from caprolactam

3 MARKS QUESTION

1. Explain the difference between the chain growth &step growth polymerzation
2. Explaion with the help of example various steps mvolved in vinyl polymerization
3. How does the process carbon tetracloride infrence the coursevinylic free radical polymerization?explain with an example?
4. Distinguish between low melting point&high meltingpoint
5. Explain how does 1,3 butadiene polymerise by different routes?
6. Discuss the machenism of free radical polymerisation of alkene?
7. What is cationic polymerisation? What type of alkene prefer to undergo cationic polymerisation?
8. Discuss the machenism of aneonic polymerisation .What type of alkenes refer to undergo polymerisation?
9. Explain copolymerisation with suitable example?
10. Distinguish between thermosetting and thermoplastic polymers?
11. How is bakelite formed?Explain the reactions with equections?

1. Atomic Structure and Chemical Bonding
2. Solid State
3. Solutions
4. Thermodynamics
5. Electrochemistry
6. Chemical Kinetics
7. P Block Elements
8. D and F Block Elements
9. Nuclear Chemistry
10. Stereo Chemistry
11. Organic Functional Group I
12. Organic Functional Group II and III
13. Surface Chemistry
14. Chemistry In Every Day Life
15. Polymers
16. Practice Paper No.1
17. Practice Paper No.2
18. Practice Paper No.3
19. Practice Paper No.4