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.Management Sciences
Category: Fertilizer Technology
Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching ?
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A. Isopropyl alcohol
B. Butyl alcohol
C. Toluene
D. Hexane
Chemical formula of meta-phosphoric acid is ___________________?
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 represented as______________________?
A. NH2.CO.NH2
B. NH3CO.CH3
C. NH.CO2.NH
D. NH3.CO2.NH3
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
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