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.Management Sciences
Category: Fertilizer Technology
Dehydration of ammonium carbamate produces__________________?
0
A. Urea
B. Biuret
C. Ammonia water
D. None of these
Yield of elemental phosphorous from rock phosphate is about _____________ percent?
A. 1-2
B. 15-25
C. 40-45
D. 60-65
Ammonia synthesis reaction is______________________?
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
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