Chemical Engineering MCQs

Page No. 692

Glycerine can be obtained from ________________ ?


aFat


bNaphthalene


cCumene


dSucrose


View Answer Fat

Permanent hardness of water is due to the presence of calcium & magnesium __________________?


aBi-carbonates


bSulphates & chlorides


cCarbonate


dNone of these


View Answer Sulphates & chlorides

Deaeration of water in its treatment is necessary, as it___________________?


aMinimises its turbidity


bHelps in controlling its taste and odour


cMinimises its corrosiveness


dNone of these



Use of water having dissolved oxygen in boilers promotes___________________?


aCorrosion


bSequestration


cScale formation


dNone of these


View Answer Corrosion

Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces ________________?


aNylon-6


bDacron


cPolyester


dPVC


View Answer Dacron

Sudden temperature fluctuation does not affect pyrex glass, because of its __________________?


aLow co-efficient of expansion


bHigh co-efficient of expansion


cHigh melting point


dBoth B. and (C)



Which of the following is a constituent of coffee ?


aCaffeine


bNicotine


cCalgon


dLignin


View Answer Caffeine

Dacron (or Terylene) fibres as compared to nylon fibres have__________________?


aBetter heat & acid resistant properties


bPoorer resistance to alkalis


cPoorer dyeability


dAll A , B. and C.


View Answer All A , B. and C.

Common salt is generally not produced commonly by ________________ method from brine ?


aFreeze drying


bElectrolytic


cSolar evaporation


dVacuum evaporation


View Answer Freeze drying

Flash point of most vegetable oils is about _______________ °C ?


a50


b100


c200


d300


View Answer 200

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