Chemical Engineering MCQs

Page No. 715

Co-efficient of thermal expansion of glass is decreased by the addition of _______________ during its manufacture?


aCaO


bMnO2


cZnO


dFeS


View Answer ZnO

More than 100 percent of _________________ is present in oleum?


aSO3


bH2SO4


cH2SO3


dSO2


View Answer H2SO4

Which of the following is not an abrasive material ?


aBakelite


bPumice


cCorundum


dCarborundum


View Answer Bakelite

Black liquor is converted into white liquor by __________________________?


aEvaporation and burning the concentrate followed by causticisation of products


bMulti-effect evaporation only


cSelective liquid extraction


dExtractive distillation



Roasting of metallurgical ores is done mainly to ___________________?


aDehydrate it


bSinter the ore


cRemove CO2 & H2O


dRemove arsenic & sulphur



Liquor poisoning generally occurs due to the presence of _________________ in it ?


aEthyl alcohol


bImpurities


cMethyl alcohol


dCarbonic acid


View Answer Methyl alcohol

Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?


aReduction


bRoasting


cCalcination


dSmelting


View Answer Roasting

Alcohol content in freshly prepared natural and fortified wine may be respectively around ______________ percent ?


a7-14 and 14-30


b7-14 and 40-50


c14 – 30 and 40-50


d10 – 20 and 40 – 50


View Answer 7-14 and 14-30

Saponification number of an oil or fat____________________?


aGives an idea about its molecular weight


bIs inversely proportional to its molecular weight


cDetects its adulteration


dAll A , B. & C.


View Answer All A , B. & C.

Coke used for the production of calcium carbide should have____________________?


aLow ash content


bLow ignition temperature


cHigh electrical resistivity


dAll A , B. and C.


View Answer All A , B. and C.

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