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.Management Sciences
Category: Fertilizer Technology
Red phosphorous is changed into white phosphorous by______________________?
A. Heating in presence of light
B. Melting under pressure
C. Vaporisation followed by condensation
D. None of these
Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by________________?
A. Steam reforming of naphtha and cracking of natural gas
B. Electrolysis of water
C. Cryogenic separation of hydrogen from coke oven gas
D. All A., B. and C.
Which is a catalyst promoter used in catalytic ammonia synthesis reaction ?
A. Al2O3
B. Cr2O3
C. K2O
D. MnO
Nitric acid is produced on commercial scale in a fertiliser plant by___________________?
A. Oxidation of ammonia
B. CaNO3 + H2SO4 reaction
C. Passing air through high voltage electric arc
D. None of these
Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at ______________ °C?
A. 250-300
B. 500-750
C. 950-1050
D. 1400-1450
-10-5 fertilisers mean that they contain______________?
A. 5, 10, 5% respectively of N2, P2O5 and K2O
B. Only 5 to 10% active fertiliser constituents
C. 5 to 10% filler & carrier of soil conditioners
D. None of these
Calcium ammonium nitrate (CAN) is__________________?
A. A mixed fertiliser
B. A straight fertiliser
C. A complex fertiliser
D. Not a fertiliser; it is an explosive
A Potassic fertiliser contains 50% K2O. It could be _________________?
A. Potassium sulphate
B. Potassium chloride
C. A mixture of NaCl + KCl
D. None of these
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