Related Questions

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
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
Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.
A 250-300
B 500-750
C 950-1050
D 1400-1450
An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
A Resistance
B Arc
C Low frequency induction
D None of these
K produces 100 parts twice as fast as G does. G produces 100 parts in 40 minutes. If each produces parts at a constant rate, how many parts will K produces in 6 minutes.
A 30
B 25
C 20
D 15
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
Reaction of nitric acid and sulphuric acid with phosphate rock produces
A Nitrophosphate
B Diammonium phosphate
C Tricresyl phosphate
D Tributyl phosphate
Leaching of phosphate rock by strong __________ acid produces phosphoric acid.
A Sulphuric
B Hydrochloric
C Either A or B
D Neither A nor B
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

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