Chemical Engineering MCQs

Page No. 740

Separation of fresh water from sea water can be done by the _______________ operation ?


aOsmosis


bReverse osmosis


cAbsorption


dAdsorption


View Answer Reverse osmosis

Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like_________________?


aHigh cost


bFragile nature


cEasy poisoning tendency


dAll A, B. and C.


View Answer All A, B. and C.

Presence of H2S in raw water (to be chlorinated) results in the_____________________?


aReduced softening capacity of zeolite


bIncreased dosage of chlorine to provide a disinfecting residual in the water


cEasy removal of its hardness


dNone of these



______________ is an ore of lead?


aQuartz


bGalena


cSiderite


dChalcopyrite


View Answer Galena

Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by _____________________?


aIron-steam reaction


bElectrolysis of water


cSteam reforming of naphtha


dIts cryogenic separation from coke oven gas


View Answer Iron-steam reaction

The most commonly used substance to speed up the sedimentation of sewage is___________________?


aLime


bSulphuric acid


cChlorine


dSodium bisulphite


View Answer Lime

Which of the following is not produced commercially from sea water ?


aMagnesium & potassium compounds


bCommon salt


cBromine


dIodine


View Answer Iodine

Oleum produces fumes of_____________________?


aSO2


bH2SO4


cSO3


dSO2 + H2SO4


View Answer SO3

Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in______________________?


aPyrolysis of oil


bSintering of porous catalyst


cHydrogen embrittlement


dAll A, B. and C.


View Answer All A, B. and C.

Rancidity of the fatty oil can be reduced by its__________________?


aDecoloration


bHydrogenation


cOxidation


dPurification


View Answer Hydrogenation

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