Chemical Engineering MCQs

Page No. 748

SO2 is bubbled through hot sugar cane juice to_______________?


aAct as an acidifying agent


bIncrease its concentration


cIncrease the amount of molasses


dIncrease the crystal size



In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed ?


aFurnace → converter → absorber


bFurnace → evaporator → absorber


cFurnace → converter → evaporator


dConverter → furnace → absorber



Reaction of calcium carbide with water produces a gas, which is used_________________?


aAs an illuminant


bFor metal cutting/welding


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Styrene (a monomer for the production of polystyrene) is commercially produced by ____________________?


aCatalytic dehydrogenation of ethyl benzene


bDehydration of ethyl alcohol followed by hydrogenation


cReacting ethylene oxide with acetaldehyde


dFermentation of starch



Carboxymethyl cellulose (CMC) is added in detergents to_________________?


aPrevent redeposition of soil on cleaned surface


bAct as optical brightening agent


cInhibit corrosion in washing machines made of aluminium


dNone of these



Carborundum consists mainly of_________________?


aBauxite


bSilicon carbide


cBoron carbide


dCalcium carbide


View Answer Silicon carbide

Soap cannot be used with hard water, because _________________?


aHard water contains sulphate


bThey form insoluble calcium soaps which precipitate


cThey attract back the removed dirt


dNone of these



The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about ________________ cm2/gm?


a800


b1600


c4000


d8500


View Answer 1600

Phenolic antiseptics are added in the __________________ soap?


aShaving


bMedicated


cMetallic


dTransparent


View Answer Medicated

Inversion of sucrose produces_____________________?


aFructose


bGlucose


cBoth A. & B.


dNeither A. nor B.


View Answer Glucose

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