Chemical Engineering - Polymer Technology

16. 

Which of the following low molecular weight (<104 ), soft & waxy polymer is used in chewing gum ?

A. Cellulose acetate
B. Polyvinyl acetate
C. Thiokol
D. PVC

Answer: Option B

Explanation:

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17. 

Buna-S is a __________ material.

A. fibrous
B. plastic
C. resinous
D. rubbery

Answer: Option D

Explanation:

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18. 

Zeigler - Natta catalyst (AlR3 - AlCl3) is used in the polymerisation of

A. vinyl acetate
B. vinyl chloride
C. propylene
D. styrene

Answer: Option C

Explanation:

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19. 

Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of

A. cold SBR
B. butyl rubber
C. Bunai N
D. Buna S

Answer: Option B

Explanation:

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20. 

Neoprene is a

A. monomer
B. synthetic rubber
C. polyester
D. none of these

Answer: Option B

Explanation:

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