Chemical Engineering MCQs

Page No. 6

Maximum nitrogen percentage is in________________?


aAmmonium sulphate


bCalcium ammonium nitrate


cUrea


dLiquid ammonia


View Answer Liquid ammonia

An increase in the NH3/CO2 ratio in urea manufacture results in__________________?


aIncreased degree of conversion of CO2 to urea


bDecreased degree of conversion of NH3 to urea


cDecreased yield of urea


dDecreased specific volume of molten mass



Electric furnace method for production of phosphorous uses phosphate rock and _________________________?


a Phosphoric acid


bCoke


cSulphuric acid


dSilica and coke


View Answer Silica and coke

Urea is a better fertilizer than ammonium sulphate, because__________________?


aIt is cheaper


bNitrogen content is higher


cIt is not poisonous


dIt is easy to manufacture



Conditioners like finely divided peat are added to the fertiliser to________________?


aCounteract burning


bAvoid caking & hardening


cProduce bulk


dIncrease its solubility



Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas ?


aWater


bNaphtha


cTar


dCoal/coke oven gas


View Answer Tar

Color of nitric acid is light yellow due to the presence of__________________?


aNO


b NO2


c N2H5


dNH3


View Answer NO2

Catalyst used in steam reforming of naphtha is__________________?


a Nickel


bPlatinum


cSilica gel


dRhodium


View Answer Nickel

Steam reforming of naphtha produces ammonia synthesis gas. This is a/an ____________ process?


aAutocatalytic


bEndothermic


cExothermic


dNon-catalytic


View Answer Endothermic

Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of____________________?


aComparatively higher pressure drop


bHigh cost of the high pressure vessel used for the reactor


cHigher pumping cost


dChances of entrainment and disturbance of catalyst bed



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