Presence of an inert atmosphere
Presence of a reducing atmosphere
Absence of air
Presence of an oxidising atmosphere
✅ The correct answer is option C.
Fertilizer Technology MCQs
Heating of orthophosphoric acid to about 900°C, produces
Metaphosphoric acid
Pyrophosphoric acid
No change in it
None of these
✅ The correct answer is option A.
The composition of fresh feed to the high temperature, high pressure urea autoclave is
Excess liquid ammonia and liquefied CO₂
Excess liquid ammonia and compressed CO₂ gas
Liquid ammonia and excess compressed CO₂
Compressed ammonia gas and excess compressed CO₂
✅ The correct answer is option B.
Urea is a __________ fertiliser.
Nitrogenous
Potassic
Phosphatic
None of these
✅ The correct answer is option A.
Nitrolime is chemically known as
Calcium nitrate
Ammonium nitrate
Calcium ammonium nitrate (CAN)
None of these
✅ The correct answer is option C.
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium
Carbonate
Phosphate
Bicarbonate
Silicate
✅ The correct answer is option A.
Effectiveness of a fertiliser is independent of the
Nature of soil
Type of crop
PH of soil
None of these
✅ The correct answer is option D.
Reaction of phosphate rock with 98% H₂SO₄ produces
Orthophosphoric acid
Superphosphate
White phosphorous
None of these
✅ The correct answer is option A.
An increase in the NH₃/CO₂ ratio in urea manufacture results in
Increased degree of conversion of CO₂ to urea
Decreased degree of conversion of NH₃ to urea
Decreased yield of urea
Decreased specific volume of molten mass
✅ The correct answer is option A.
A potassic fertiliser contains 50% K₂O. It could be
Potassium sulphate
Potassium chloride
A mixture of NaCl+ KCl
None of these
✅ The correct answer is option A.