31. A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.
Salt & coke
Sand & coke
And coke
And sand
✅ The correct answer is option B.
Fertilizer Technology MCQs
32. Phosphatic fertiliser is graded based on its __________ content.
P₂O₃
PCl5
P₂O₅
H₃PO₄
✅ The correct answer is option C.
33. The main constituent of rock phosphate is
Mono-calcium phosphate
Di-calcium phosphate
Fluorspar
None of these
✅ The correct answer is option B.
34. Which of the following nitrogenous fertilisers has the highest percentage of nitrogen?
Calcium nitrate
Calcium ammonium nitrate (CAN)
Urea
Ammonium sulphate
✅ The correct answer is option C.
35. Prilling tower is found in the flowsheet for the manufacture of
Ammonia
Urea
Superphosphate
Triple superphosphate
✅ The correct answer is option B.
36. A fertiliser contains 82% N₂. It could be
Urea
Liquid NH₃
Ammonium nitrate
None of these
✅ The correct answer is option B.
37. Which of the following solvents is used for the extraction of H₃PO₄ from CaCl₂ solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?
Iso propyl alcohol
Butyl alcohol
Toluene
Hexane
✅ The correct answer is option B.
38. Catalyst used in the oxidation of ammonia is
Platinum-beryllium
Platinum-rhodium
Cobalt-molybdenum
Platinum-molybdenum
✅ The correct answer is option B.
39. Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N₂ & H₂ is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.
Stabilisation
Increasing the effectiveness
Improving the strength & heat resistance
All of the above
✅ The correct answer is option D.
40. Raw materials for nitric acid manufacture are
Hydrogen peroxide, air and water
Anhydrous ammonia and air
Anhydrous ammonia, air and water
Wet ammonia, air and water
✅ The correct answer is option C.