31. |
State true order of right and wrong statements regarding low density polythene.
(i) It is chemically inert.
(ii) Its boiling point is high due to its lesser density.
(iii) Its water absorption capacity is high .
(iv) It has more number of polymer molecules containing less molecules mass.
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Answer:
Option (b) |
32. |
Cellulose diacetate (rayon) is obtained by acetylation of cellulose with _____ in acidic medium.
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Answer:
Option (a) |
33. |
Which rubber is used in place of natural rubber ?
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Answer:
Option (c) |
34. |
Give example (S) of high density thermosetting polymer.
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Answer:
Option (c) |
35. |
From the following which is not a homopolymer ?
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Answer:
Option (c) |
36. |
From the following which is a homopolymer ?
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Answer:
Option (d) |
37. |
Which example of co-polymer is improper ?
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Answer:
Option (d) |
38. |
Which polymer from the following is a product of condensation polymerization ?
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Answer:
Option (c) |
39. |
What is called to the polymers in which long chain of polymers are held together by weak intermolecular attraction forces ?
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Answer:
Option (a) |
40. |
A = Nylon-66, B = Buna-S; C = Polythene arrange these polymers in increasing order of strength of intermolecular forces.
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Answer:
Option (c) |