Fertiliser Technology In the manufacture of orthophosphoric acid by strong H₂SO₄ leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable Pyrophosphoric acid CaSO₄ .½H₂O and CaSO₄ crystals Metaphosphoric acid All of these Pyrophosphoric acid CaSO₄ .½H₂O and CaSO₄ crystals Metaphosphoric acid All of these ANSWER DOWNLOAD EXAMIANS APP
Fertiliser Technology The optimum size of the ammonia plant is __________ tons/day. 1000C 10 100 1000 1000C 10 100 1000 ANSWER DOWNLOAD EXAMIANS APP
Fertiliser Technology Temperature and pressure in urea autoclave is 400°C and 550 atm 200°C and 10 atm 190°C and 200 atm 120°C and 300 atm 400°C and 550 atm 200°C and 10 atm 190°C and 200 atm 120°C and 300 atm ANSWER DOWNLOAD EXAMIANS APP
Fertiliser Technology Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis? H? separation from coke oven gas Steam reforming of naphtha Cracking of natural gas Electrolysis of water H? separation from coke oven gas Steam reforming of naphtha Cracking of natural gas Electrolysis of water ANSWER DOWNLOAD EXAMIANS APP
Fertiliser Technology Nitric acid is produced on commercial scale in a fertiliser plant by None of these CaNO₃ + H₂SO₄ reaction Oxidation of ammonia Passing air through high voltage electric arc None of these CaNO₃ + H₂SO₄ reaction Oxidation of ammonia Passing air through high voltage electric arc ANSWER DOWNLOAD EXAMIANS APP
Fertiliser Technology Multistage operation (as in the case of catalytic oxidation of SO₂) is not carried out for NH₃ synthesis, because of High cost of the high pressure vessel used for the reactor Higher pumping cost Chances of entrainment and disturbance of catalyst bed Comparatively higher pressure drop High cost of the high pressure vessel used for the reactor Higher pumping cost Chances of entrainment and disturbance of catalyst bed Comparatively higher pressure drop ANSWER DOWNLOAD EXAMIANS APP
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