Chemical Engineering MCQs

Page No. 4

Reaction of anhydrous liquid ammonia with ortho-phosphoric acid produces____________________?


aAmmonium phosphate


b Superphosphate


cTriple superphosphate


dNone of these


View Answer Ammonium phosphate

In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at________________?


aLow pressure


bHigh pressure


cVery high temperature


dAtmospheric pressure; as the pressure has no effect on conversion


View Answer High pressure

Nitric acid is produced on commercial scale in a fertiliser plant by___________________?


aOxidation of ammonia


bCaNO3 + H2SO4 reaction


c Passing air through high voltage electric arc


dNone of these


View Answer Oxidation of ammonia

With increases in pressure, the conversion of Ammonium carbamate into urea___________________?


aIncreases


bDecreases


cRemains unaltered


dCan either increase or decrease depends on biuret content


View Answer Increases

Nitrogen content of urea is about _____________ percent ?


a10


b46


c 80


d94


View Answer 46

Nitrogen content of a nitrogenous fertiliser is 35%. It could be___________________?


a Urea


bAmmonium nitrate


cCalcium ammonium nitrate (CAN)


dAmmonium sulphate


View Answer Ammonium nitrate

Plant tranquillisers___________________?


aHold back stem growth and halt plants at a desired height


bCause early maturation of plants


cAccelerate ripening of food and grain


dProduce seedless fruit



Raw materials for nitric acid manufacture are___________________?


aHydrogen peroxide, air and water


bAnhydrous ammonia and air


cAnhydrous ammonia, air and water


dWet ammonia, air and water



Pick out the wrong statement ?


aLPG is also used as fuel for automobiles & small furnaces and for cutting & welding of metals


bThe minimum temperature, at which a petroleum oil vapor catches fire and continues to burn, is called its flash point


cEach ton of petroleum oil on distillation produces about 30-50 Nm3 of gas


dMaximum yield of naphthalene is obtained on distillation of crude oil



Pick out the wrong statement ?


aHigh concentration of oxygen in flue gas means high stack loss


bGaseous fuels require the least % excess air for complete combustion


c The ratio of fixed carbon to volatile matter percentage in coal is called its ‘fuel ratio’


dCalorific value of natural gas is more than that of LPG



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