Which of the following are example of synthetic rubber?

(a) Polychloroprene

(b) Polyacrylonitrile

(c) Buna-N

(d) cis-polyisoprene

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Solution

Answers: (a), and (c).

Synthetic Polymer: Polymer which is not found in nature and can be synthesised in laboratory and industry is known as the synthetic polymer.

e.g.,

(i) Polychloroprene also is known as neoprene, is a polymer of chloroprene. It is a synthetic rubber.

(ii) Buna-N, a synthetic rubber can be obtained by copolymerisation of 1, 3-Butadiene and acrylonitrile as shown below

Suggest Corrections

Assertion: Natural rubber is all cis-polyisoprene.

Reason: trans - polyisoprene cannot be formed.

Match materials given in Column I with the polymers given in Column II.

$\begin{matrix} C o l u m n I & C o l u m n I I A . N a t u r a l r u b b e r l a t e x & 1. N y l o n B . W o o d l a m i n a t e s & 2. N e o p r e n e C . R o p e s a n d f i b r e s & 3. D a c r o n D . P o l y e s t e r f a b r i c & 4. M e l a m i n e f o r m a l d e h y d e r e s i n s E . S y n t h e t i c r u b b e r & 5. U r e a - f r o m a l d e h y d e r e s i n s F . U n b r e a k a b l e c r o c k e r y & 6. c i s - p o l y i s o p r e n e \end{matrix}$

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Which of the following are example of synthetic rubber? (a) Polychloroprene (b) Polyacrylonitrile (c) Buna-N (d) cis-polyisoprene

Assertion: Natural rubber is all cis-polyisoprene.

Reason: trans - polyisoprene cannot be formed.

Which of the following are example of synthetic rubber?

(a) Polychloroprene

(b) Polyacrylonitrile

(c) Buna-N

(d) cis-polyisoprene