Search
.Management Sciences
Category: Fertilizer Technology
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium___________________?
0
A. Carbonate
B. Phosphate
C. Bicarbonate
D. Silicate
Maximum stability of white phosphorous is at__________________?
A. Very high pressure
B. Atmospheric pressure
C. Room temperature
D. > 600°C
Ammonium nitrate (a fertiliser) is coated with limestone powder to ____________________?
A. Increase its nitrogen content
B. Cut down its production cost
C. Avoid the risk of explosion
D. Add extra nutrient as fertiliser
(CH3 C6 H4)3 PO4 is the chemical formula of__________________?
A. Triple superphosphate
B. Tricresyl phosphate
C. Fluorapatite
D. Superphosphate
Nitrogen content in ammonium sulphate (a fertiliser) is around ______________ percent?
A. 5
B. 20
C. 50
D. 65
Rock phosphate constitutes mainly of___________________?
A. Fluorapatite
B. Di-calcium phosphate
C. Mono-calcium phosphate
D. Di-ammonium phosphate
Phosphoric acid is produced in wet process from phosphate rock and____________________?
A. Dilute H2SO4
B. Concentrated H2SO4
C. Concentrated NHO3
D. Concentrated HCl
Chemical formula of biuret is_________________?
A. NH2.CO.NH2
B. NH3.COO.NH3
C. NH2CONHCONH2
D. NH4COONH2
Dehydration of ammonium carbamate produces__________________?
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
Recent Comments