Related Questions

__________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.
A Calcium
B Fluorine
C Phosphorous
D Sulphur
Low grade phosphate rock can be used in electrical furnace, because
A Of the better CaO/SiO2 balance for slag formation
B CaO content is less
C It is cheap
D It produces low cost product
Leaching of phosphate rock by strong __________ acid produces phosphoric acid.
A Sulphuric
B Hydrochloric
C Either A or B
D Neither A nor B
Triple superphosphate is made by reacting phosphate rock with __________ acid.
A Phosphoric
B Nitric
C Sulphuric
D Hydrochloric
Action of phosphoric acid on rock phosphate produces
A Superphosphate
B Triple superphosphate
C Nitrophosphate
D Diammonium phosphate
Reaction of dilute sulphuric acid with phosphate rock produces
A Phosphoric acid
B Superphosphate
C Triple superphosphate
D Gypsum
Reaction of orthophosphoric acid with phosphate rock produces
A Superphosphate
B Triple superphosphate
C Metaphosphoric acid
D Monoammonium phosphate
Reaction of nitric acid and sulphuric acid with phosphate rock produces
A Nitrophosphate
B Diammonium phosphate
C Tricresyl phosphate
D Tributyl phosphate
Yield of elemental phosphorous from rock phosphate is about __________ percent.
A 1-2
B 15-25
C 40-45
D 60-65
Electric furnace method for production of phosphorous uses phosphate rock
A And phosphoric acid
B And coke
C And sulphuric acid
D Silica and coke

Next steps