Chemical Engineering MCQs

Page No. 738

Sand and ______________ is fused at 1300°C, to produce sodium silicate ?


aLimestone


bSoda ash


cCoke


dSodium sulphate


View Answer Soda ash

The main use of HCl is in the___________________?


aDrilling of petroleum wells and pickling of steel sheets


bManufacture of cationic detergent


cTreatment of spent fuel of nuclear reactor


dNone of these



High purity nitrogen is used in__________________?


aMaking protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils


bFire fighting purposes


cBoth A. & B.


dNeither A. nor (B)


View Answer Both A. & B.

Percentage of glycerine present in the spent lye obtained during soap manufacture is about________________?


a0.5


b5


c20


d35


View Answer 5

Which of the following is an unsaturated fatty acid ?


aLauric acid


bPalmitic acid


cStearic acid


dOleic acid


View Answer Oleic acid

Iron ore hematite is concentrated using ____________________?


aElectromagnetic separation mainly


bGravity separation


cFroth floatation


dRoasting


View Answer Gravity separation

The most widely used coagulant for removing suspended impurities from water is__________________?


aBleaching powder


bChlorine


cCalcium sulphate


dAlum


View Answer Alum

Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ?


aDepithing


bDigestion


cBleaching


dNone of these


View Answer Depithing

Flexible foam (for mattresses) is usually made of_____________________?


aPVC


bSilicone


cPolyurethanes


dPolyamides


View Answer Polyurethanes

Thermoplastic materials_____________________?


aDo not soften on application of heat


bAre heavily branched molecules


cAre solvent insoluble


dNone of these


View Answer None of these

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