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.Management Sciences
Category: Fertilizer Technology
Potassic fertilisers do not promote the development of ______________________?
A. Stems & leaves during early stage of plant growth
B. Starches of potatoes & grains
C. Sugar of fruits & vegetables
D. Fibrous materials of plants
Fertiliser plants get their N2 requirements _____________________?
A. By fractionation of liquefied air
B. By dissociating oxides of nitrogen
C. From coal gas (coke oven gas)
D. From producer gas
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________________?
A. Low pressure
B. High pressure
C. Very high temperature
D. Atmospheric pressure; as the pressure has no effect on conversion
____________ catalyst is used in the production of urea from CO2 and NH3?
A. Vanadium pentoxide
B. No
C. Alumina
D. Nickel
Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition _______________?
A. Electrolysis of water
B. Cryogenic removal of H2 from coke oven gas
C. Steam reforming of naphtha
D. Natural gas cracking
Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant ?
A. Urea
B. CAN
C. Ammonium sulphate
D. Superphosphate
Pick out the correct statement?
A. Reaction of NH3 with HNO3 to produce (NH4)2NO3 is endothermic
B. With increase in NH3/CO2 ratio, urea yield decreases for a given temperature, pressure and
total feed rate
C. Biuret (an intermediate during urea manufacture) is toxic to seeds and animals
D. Both B. and C.
Ammonia synthesis gas is produced from natural gas by___________________?
A. Thermal cracking
B. Steam reforming
C. Partial oxidation
D. Hydrogenation
Conditioners like finely divided peat are added to the fertiliser to________________?
A. Counteract burning
B. Avoid caking & hardening
C. Produce bulk
D. Increase its solubility
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