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


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


cPartially crystalline state


dAll A., B. and C.


View Answer All A., B. and C.

Alkyd resin is a/an___________________?


aPolyamide


bPolyester


cPolyolefin


dAddition polymer


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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