In wet process (strong sulphuric acid leaching for the manufacture of orthophosphoric acid a by-product obtained is
A.CaSO4.1
B.CaSO4.2H2O
C.CaSO4.
D.CaSO4
Category: Fertilizer Technology Mcqs
The electric furnace is used for the manufacture of elemental phosphorus from a phosphate rock. The fused section of the furnace where the reduction to elemental phosphorus takes place is maintained at
A.500-600?C
B.800-900?C
C.1400-1450?C
D.2000-2100?C
Ammonium nitrate is made by reacting liquid ammonia and 60% nitric acid. The reaction is
A.endothermic
B.exothermic
C.catalytic
D.reversible
Fuming nitric acid is
A.hot concentrated HNO3
B.concentrated HNO3 containing dissolved NO2
C.the purest form of HNO3
D.a mixture of concentrated HNO3 and concentrated HCI
Ammonium phosphates are made by reacting anhydrous liquid ammonia with
A.nitric acid
B.orthophosphoric acid
C.strong sulphuric acid
D.metaphosphoric acid
For given NH3/CO2 ratio temperature urea production rate
A.decreases with increasing pressure
B.increases with increasing pressure
C.remains constant with change in pressure
D.decreases linearly with increasing pressure
Fertilizer value of a nitrogenous fertilizer is expressed in terms of its
A.N content
B.NH3 content
C.HNO3 content
D.NO content
Metaphosphoric acid can be made by heating the orthophosphoric acid to about
A.250?C
B.500?C
C.900?C
D.1500?C
Phosphatic fertilizer is graded based on its
A.P2O5 content
B.P content
C.PCI3 content
D.H3PO4 content
