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.Management Sciences
Category: Fertilizer Technology
Ammonia synthesis reaction is______________________?
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A. Exothermic
B. Endothermic
C. Autocatalytic
D. None of these
______________ is the most suitable fertiliser for paddy?
A. Urea
B. Ammonium sulphate
C. Superphosphate
D. Potassium nitrate
The main constituent of rock phosphate is _____________________?
A. Mono-calcium phosphate
B. Di-calcium phosphate
C. Fluorspar
D. None of these
Nitrolime is___________________?
A. Calcium nitrate
B. Calcium ammonium nitrate
C. A mixture of nitric acid and lime
D. A mixture of ammonium nitrate and calcium nitrate
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 ?
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.
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