Visitors Online: 68 | Monday 17th December 2018
REGISTRATION
Online Fashion Store

CBSE Important Questions

CBSE Guess > Papers > Important Questions > Class XII > 2013 > Chemistry > Polymers by Mr. R. Srinivas Vasudevamurthy

CBSE CLASS XII

Polymers - 3 Marks Questions

1. Explain the terms

a) monomer
b) polymer
c) polymerization

2. What are homo polymers and co polymers? Give 2 examples each.

3. Arrange the following in the increasing order of molecular forces:

a) Nylon 66
b) polythene
c) Buna-S-rubber

4. How are polymers classified on the basis of their structure? Give 2 examples each.

5. What do you mean by addition and condensation polymers? Give 2 examples each.

6. What are

a) natural polymers
b) semi synthetic polymers
c) synthetic polymers? Give one example each.

7. What are biodegradable polymers? Give an example of biodegradable

a) polyester
b) poly amide.

8. What are poly esters? Give two examples.

9. What are poly amides? Give two examples.

10. Give differences between

a) thermoplastic and thermo setting plastic
b) Nylon 6 and Nylon 66
c) Novolac and Bakelite
d) Buna-S and Buna-N rubber.

11. Explain the mechanism of polymerization of ethene.

12. How is

a) Low density polythene
b) High density polythene prepared? Mention their properties and give two uses of each.

13. Name and give the structures of monomers of

a) polythene
b) poly propene
c) PVC
d) Poly acrylo nitrile
e) Teflon
f) Dacron ( Terelene)
g) Glyptal
h) Nylon 6
i) Bakelite
j) Nylon 66
k) Poly styrene
l) Natural rubber
m) Neoprene
n) Buna-N rubber
o) Buna-S-rubber
p) Novolac

14. Write the equation of the reaction involved in the preparation of

a) polythene
b) poly propene
c) PVC
d) Poly acrylo nitrile
e) Teflon
f) Dacron ( Terelene)
g) Glyptal
h) Nylon 6
i) Bakelite
j) Nylon 66
k) Poly styrene
l) Natural rubber
m) Neoprene
n) Buna-N rubber
o) Buna-S-rubber
p) Novolac
q) Nylon-2 Nylon-6
r) PHBV
s) Melamine formaldehyde resin. Classify them as

i) addition or condensation polymer
ii) homo polymer or co polymer. Give two uses of each.

15. What do you mean by vulcanization of natural rubber? What is the purpose of  vulcanization?

16. Draw the structure of natural rubber.

17. How does the presence of double bond influence the structure and reactivity of rubber?

18.   Is ( NH-CH-CO)  n homo polymer or co polymer?

19. Identify the monomer present in the polymer   (CO- (CH2)6-NH- (CH2)6-NH-)n

 

Submitted By : Mr. R. Srinivas Vasudevamurthy
Email: vasudm@yahoo.co.uk