Chemical Engineering MCQs

Page No. 322

Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about ______________ ° C?


a -20

✖


b50

✓


c250

✖


d500

✖


View Answer 50

Plastic articles are normally produced by _____________ moulding?


aGreen sand

✖


bInjection

✓


cShell

✖


dDry sand

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View Answer Injection

Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is_______________________?


aNi

✖


bV2O5

✖


cFe

✖


dAluminium triethyl combined with titanium tetrachloride

✓



Polycaprolactam (Nylon – 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about ______________ percent?


a50

✖


b75

✖


c90

✓


d99

✖


View Answer 90

Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?


aWater impermeable cellophane

✖


bPolythene

✓


cCellulose acetate

✖


dTeflon

✖


View Answer Polythene

The physical state in which polymers exist is___________________?


aMelts & rubber like state

✖


bAmorphous glassy state

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cPartially crystalline state

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dAll A., B. and C.

✓


View Answer All A., B. and C.

Alkyd resin is a/an___________________?


aPolyamide

✖


bPolyester

✓


cPolyolefin

✖


dAddition polymer

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View Answer Polyester

Ion exchange resins are made of____________________?


aLucite

✖


bSulphonated Bakelite

✓


cPolystyrene

✖


dTeflon

✖


View Answer Sulphonated Bakelite

Bristles of tooth brushes are made of_______________?


aNylon-6

✖


bNylon-66

✓


cPolystyrene

✖


dPVC

✖


View Answer Nylon-66

Most of the plastics are safe to be used upto a maximum temperature of ______________ °C?


a100

✖


b150

✓


c350

✖


d450

✖


View Answer 150

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