Superphosphate is made by reacting phosphate rock with
A.dilute sulphuric acid
B.orthophosphoric acid
C.hydrochloric acid
D.gypsum
Category: Fertilizer Technology Mcqs
In wet process (strong sulphuric acid leaching) for the manufacture of orthophosphoric acid the dilute orthophoric acid (40%) is obtained from travelling pan vacuum filter. The dilute orthophosphoric acid (50%) is concentrated economically 75% orthophosphoric acid by using
A.an evaporator
B.a distillation column
C.an extractor
D.an adsorption column
The most reactive allotropic form of phosphorus is
A.red phosphorus
B.yellw phosphorus
C.black phosphorus
D.violet phosphorus
Tributyl phosphate is used
A.in extraction of uranium plutonium and thorium nitrates
B.as fertilizer
C.as plasticizer
D.as an additive and antiknock supplement compound for petrol
The chemical formula of gypsum is
A.CaSO4
B.CaSO4.H2O
C.CaSO4.2H2O
D.CaSO4.
Triple superphosphate contains
A.16-20% P2O5
B.42-45% P2O5
C.70-75% P2O5
D.90-92% P2O5
The nitrogenous fertilizer with highest percentage of nitrogen is
A.urea
B.ammonium sulphate
C.ammonium nitrate
D.calcium nitrate
Raw materials for the manufacture of nitric acid are
A.anhydrous ammonia and air
B.air and water
C.air and steam
D.anhydrous ammonia and water
Tricresyl phosphate is used
A.as an additive and antiknock supplement compound for petrol
B.in extraction of uranium plutonium and thorium nitrates
C.in nuclear reactor fuel reprocessing
D.as fertilizer
Synthetic ammonia is produced by reacting nitrogen and hydrogen gases. The reaction is
A.endothermic
B.exothermic
C.irreversible
D.catalyzed by enzymes
