A. Mono-calcium phosphate
B. Di-calcium phosphate
C. Fluorspar
D. None of these
Related Mcqs:
- Main constituent of phosphate rock is_____________________?
A. Ammonium phosphate
B. Flour apatite
C. Calcium fluoride
D. Calcium phosphate - Triple superphosphate is made by reacting phosphate rock with _____________ acid?
A. Phosphoric
B. Nitric
C. Sulphuric
D. Hydrochloric - Electric furnace method for production of phosphorous uses phosphate rock and _________________________?
A. Phosphoric acid
B. Coke
C. Sulphuric acid
D. Silica and coke - A mixture of phosphate rock ______________ is heated in an electric furnace to produce phosphorous?
A. Salt & coke
B. Sand & coke
C. And coke
D. And sand - 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 - Phosphoric acid is produced in wet process from phosphate rock and____________________?
A. Dilute H2SO4
B. Concentrated H2SO4
C. Concentrated NHO3
D. Concentrated HCl - Reaction of phosphate rock with 98% H2SO4 produces ______________________?
A. Ortho-phosphoric acid
B. Superphosphate
C. White phosphorous
D. None of these - Reaction of dilute sulphuric acid with phosphate rock produces ____________________?
A. Phosphoric acid
B. Superphosphate
C. Triple superphosphate
D. Gypsum - Leaching of phosphate rock by strong ____________ acid produces phosphoric acid ?
A. Sulphuric
B. Hydrochloric
C. Either A. or B.
D. Neither A. nor B. - Heating a mixture of phosphate rock, coke and sand in an electric furnace produces___________________?
A. Phosphoric acid
B. Ammonium phosphate
C. Phosphorous
D. Superphosphate
