Chemical Engineering - Polymer Technology

36. 

Starting material for the production of SBR is

A. ethyl alcohol
B. ethylene
C. both (a) & (b)
D. neither (a) nor (b)

Answer: Option C

Explanation:

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37. 

Which of the following is a copolymer ?

A. PVC
B. Bakelite
C. Polythene
D. Teflon

Answer: Option B

Explanation:

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38. 

Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its

A. elasticity
B. strength
C. plasticity
D. weathering characteristics

Answer: Option D

Explanation:

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39. 

The organic acid monomer in nylon 66 is

A. sebasic acid
B. terephthalic acid
C. adipic acid
D. benzoic acid

Answer: Option C

Explanation:

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40. 

Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is

A. chloroethane
B. chlorophrene
C. isoprene
D. none of these

Answer: Option B

Explanation:

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