Liquid ammonia
Urea
Ammonium phosphate
Ammonium sulphate
✅ The correct answer is option C.
Fertilizer Technology MCQs
Iron is not used alone as a catalyst in ammonia synthesis, because
Its activity declines rapidly, if heated to above 520°C
It decomposes ammonia
It gets oxidised above 500°C
None of these
✅ The correct answer is option A.
Reaction of anhydrous liquid ammonia with orthophosphoric acid produces
Ammonium phosphate
Superphosphate
Triple superphosphate
None of these
✅ The correct answer is option A.
Catalyst used in Haber’s process for ammonia production is
Reduced iron oxide
Nickel
Vanadium pentoxide
Silica gel
✅ The correct answer is option A.
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.
Increased biuret formation
High corrosion rate
Increased cost of equipment
All of the above
✅ The correct answer is option D.
Gas based fertiliser plants use
Natural gas as a source of hydrogen
Natural gas as heating medium
Coal gas as a source of hydrogen
Coal gas as heating medium
✅ The correct answer is option A.
Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by
Decreasing the pressure
Decreasing the temperature
Increasing the temperature
None of these
✅ The correct answer is option C.
Action of phosphoric acid on rock phosphate produces
Superphosphate
Triple superphosphate
Nitrophosphate
Diammonium phosphate
✅ The correct answer is option B.
Temperature and pressure in urea autoclave is
120°C and 300 atm
190°C and 200 atm
400°C and 550 atm
200°C and 10 atm
✅ The correct answer is option B.
Conditioners like finely divided peat are added to the fertiliser to
Counteract burning
Avoid caking & hardening
Produce bulk
Increase its solubility
✅ The correct answer is option B.