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.Management Sciences
Category: Fertilizer Technology
Chemical formula of meta-phosphoric acid is ___________________?
0
A. H3PO4
B. H4P2O7
C. HPO3
D. Same as that of Pyrophosphoric acid
Bio-fertilisers are cheaper, renewable and pollution free. They improve the _____________ of the soil?
A. Nutrient supply
B. Texture
C. Water holding capacity
D. All A., B. and C.
Urea is formed only____________________?
A. In liquid phase
B. In vapour phase
C. At very high temperature
D. At very low pressure (vacuum)
Catalyst used in the oxidation of ammonia is ________________?
A. Platinum-beryllium
B. Platinum-rhodium
C. Cobalt-molybdenum
D. Platinum-molybdenum
Steam reforming of naphtha produces ammonia synthesis gas. This is a/an ____________ process?
A. Autocatalytic
B. Endothermic
C. Exothermic
D. Non-catalytic
Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of_________________?
A. Phosphoric acid
B. Superphosphate
C. Phosphorous
D. Triple superphosphate
Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in ______________ of the catalyst ?
A. Stabilisation
B. Increasing the effectiveness
C. Improving the strength & heat resistance
D. All A, B & C
A nitrogenous fertiliser contains 20% N2. It could be_________________?
A. Ammonium nitrate
B. Calcium ammonium nitrate (CAN)
C. Urea
D. Ammonium chloride
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