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.Management Sciences
Category: Fertilizer Technology
In the manufacture of H3 PO4 (ortho); strong H2 SO4 leaching wet process as compared to electric furnace process___________________?
A. Uses lower grade phosphate rock
B. Requires lower capital investment in the plant
C. Produces lower purity acid
D. Is very costly
Catalyst used in steam reforming of naphtha is__________________?
A. Nickel
B. Platinum
C. Silica gel
D. Rhodium
In natural gas, the C/H ratio (by weight) varies in the range of_________________?
A. 3-4
B. 8-10
C. 15-17
D. 20-25
Prilling tower is found in the flowsheet for the manufacture of__________________?
A. Ammonia
B. Urea
C. Superphosphate
D. Triple superphosphate
Pick out the wrong statement ?
A. ‘Green acid’ is the other name of phosphoric acid produced by the reaction of phosphate rock
& sulphuric acid
B. Chemically unreactive nature of red phosphorous is due to its polymeric structure
C. Red phosphorous is the most reactive allotropic form of phosphorous
D. Red phosphorous, which is used in the manufacture of safety matches, is converted into white
phosphorous by vaporisation followed by condensation
Which of the following is not a mixed fertiliser ?
A. Nitrophosphate
B. Calcium ammonium nitrate (CAN)
C. Ammonium phosphate
D. None of these
Pick out the wrong statement?
A. Dehydration of ammonium carbamate to produce urea is endothermic
B. Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
C. Gypsum (CaSO4. 2H2O) is obtained as a by-product in the wet process for manufacture of
ortho-phosphoric acid
D. Phosphate rock when reacted with dilute H2SO4 produces superphosphate
Reaction of dilute sulphuric acid with phosphate rock produces ____________________?
A. Phosphoric acid
B. Superphosphate
C. Triple superphosphate
D. Gypsum
Ammonium nitrate is___________________?
A. Having about 40% N2
B. Not hygroscopic
C. Not prone to explosive thermal decomposition
D. Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer
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