Which of the following are synthetic rubbers? {(i) Terylene, (ii) Buna-S, (iii) Buna-N, (iv) Neoprene, (v) Polyacrylonitrile}

Correct Answer is : (ii), (iii) and (iv)

Correct Answer is : (ii), (iii) and (iv)

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TS EAMCET 10-Sep-2020 Shift 2 Solved Paper

Section: Chemistry

Question : 153 of 160

Marks: +1, -0

\text{(i) Terylene, (ii) Buna-S, (iii) Buna-N, (iv) Neoprene, (v) Polyacrylonitrile}

Solution:

\because

Buna-

S

n\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_2

(1,3

-butadine

)+n\mathrm{C}_6\mathrm{H}_5-\mathrm{CH}=\mathrm{CH}_2

(styrene);

Buna-

N

n\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_2

(1,3

-butadine

)+n\mathrm{CH}_2=\underset{\mathrm{CH}}{\underset{\vert}{\mathrm{CH}}}

(acrylonitrile) and neoprene is chloroprenei.e.

\left(\mathrm{CH}_2=\mathrm{CH}-\underset{\mathrm{CI}}{\underset{\vert}{\mathrm{C}}}=\mathrm{CH}_2\right)

All these are synthetic rubber.

Hence, option (c) is the correct answer, i.e. (ii), (iii) and (iv).

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