The percentage of nitrogen in urea is about
A.38.4 wt. %
B.46 wt. %
C.59.1 wt. %
D.61.3 wt. %
Category: Fertilizer Technology Mcqs
Grinding cost is maximum when
A.phosphate rock is ground to -200 mesh
B.phosphate rock is ground to -150 mesh
C.phosphate rock is ground to -100 mesh
D.phosphate rock is ground to -20 mesh
Urea is formed by dehydration of ammonium carbomate in a lawpressure stripping operation. The reaction is
A.reversible
B.endothermic
C.catalytic
D.exothermic
Concentration of the nitric acid from 60 to 95% can be done by
A.rectification with 93% HCl
B.adding 70-75% Mg (NO3)2 solution with 60% HNO3
C.distilling at 1 atm
D.all of the above
In the Habers process for the manufacture of ammonia
A.finely divided iron is used as a catalyst
B.finely divided molybdenum is used as a catalyst
C.finely divided nickel is used as a catalyst
D.no catalyst is required
Chemically bone ash is mainly
A.calcium phosphate
B.crude phosphorus
C.animal charcoal
D.ammonium phosphate
Tricresyl phosphate (TCP) is made by reacting cresylic acid (CH3.C6H4.OH) with
A.phosphorus oxychloride
B.phosphorus trichloride
C.orthophosphoric acid
D.phosphorus pentoxide
Ammonium carbamate is formed by reacting ammonia and carbon dioxide at 180 atm and 185?C. The reaction is
A.endothermic
B.exthermic
C.reversible
D.catalytic
The chemical formula of monoammonium phosphate is
A.NH4HPO4
B.NH4H2PO4
C.NH4H2HPO4
D.(NH4)2HPO4
