Chemical Engineering MCQs

Page No. 700

The product obtained on mixing calcium oxide with water is called __________________?


aQuicklime


bSlaked lime


cMilk of lime


dNone of these


View Answer Slaked lime

Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?


aXanthates


bStearic acid


cCalcium & aluminium stearate


dFormic acid



Sodium salt of higher molecular weight fatty acid is termed as the ______________________ soap?


aHard


bSoft


cMetallic


dLubricating


View Answer Soft

Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction__________________?


aDecreases with decrease of thickness of the flakes


bIncreases with the increasing flake size keeping the flake thickness constant


cIncreases considerably with the rise of temperature


dDecreases as the moisture content of flakes increases



Hydrazine is largely used____________________?


aAs a starting material for ‘hypo’


bIn photographic industry


cAs rocket fuel


dIn printing industry


View Answer As rocket fuel

How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln ?


a500°C


b 750°C


c1000°C


d1500°C


View Answer 1000°C

______________ is produced using molasses as the starting raw material ?


aMethyl alcohol


bEthyl alcohol


cBenzol


dDimethyl ether


View Answer Ethyl alcohol

Acetone is produced by catalytic dehydrogenation of_________________?


aPhenol


bNaphthalene


cIsopropanol


dEthyl benzene


View Answer Isopropanol

In the production of soda ash by Solvay process, the by-product is____________________?


aCaCl2


bNH4Cl


cNH3


dNaOH


View Answer CaCl2

_____________ is used as a catalyst in fat splitting ?


aZnO


bNi


cV2O5


dFeO


View Answer ZnO

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