Chemical Engineering MCQs

Page No. 6

Maximum nitrogen percentage is in________________?


aAmmonium sulphate

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bCalcium ammonium nitrate

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cUrea

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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

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cDecreased yield of urea

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dDecreased specific volume of molten mass

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


a Phosphoric acid

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bCoke

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cSulphuric acid

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dSilica and coke

✓


View Answer Silica and coke

Urea is a better fertilizer than ammonium sulphate, because__________________?


aIt is cheaper

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bNitrogen content is higher

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cIt is not poisonous

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dIt is easy to manufacture

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


aCounteract burning

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bAvoid caking & hardening

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cProduce bulk

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dIncrease its solubility

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


aWater

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bNaphtha

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cTar

✓


dCoal/coke oven gas

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View Answer Tar

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


aNO

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b NO2

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c N2H5

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dNH3

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View Answer NO2

Catalyst used in steam reforming of naphtha is__________________?


a Nickel

✓


bPlatinum

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cSilica gel

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dRhodium

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View Answer Nickel

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


aAutocatalytic

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bEndothermic

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cExothermic

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dNon-catalytic

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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

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bHigh cost of the high pressure vessel used for the reactor

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cHigher pumping cost

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dChances of entrainment and disturbance of catalyst bed

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