101. Maximum nitrogen percentage is in
Ammonium sulphate
Calcium ammonium nitrate
Urea
Liquid ammonia
✅ The correct answer is option D.
Fertilizer Technology MCQs
102. Low grade phosphate rock can be used in electrical furnace, because
Of the better CaO/SiO₂ balance for slag formation
CaO content is less
It is cheap
It produces low cost product
✅ The correct answer is option A.
103. Catalyst used in ammonia synthesis uses __________ as a promoter.
Pt
K₂O
Al2O₃
Ni
✅ The correct answer is option B.
104. pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant.
4-May
7-Aug
9-Oct
Dec-13
✅ The correct answer is option B.
105. Nitric acid is produced on commercial scale in a fertiliser plant by
Oxidation of ammonia
CaNO₃ + H₂SO₄ reaction
Passing air through high voltage electric arc
None of these
✅ The correct answer is option A.
106. A nitrogenous fertiliser contains 20% N₂. It could be
Ammonium nitrate
Calcium ammonium nitrate (CAN)
Urea
Ammonium chloride
✅ The correct answer is option B.
107. Nitrogenous fertiliser is required
During the early stage of growth to promote development of stem and leaves
For accelerating fruit formation in later stage of growth
To lessen the effect of excessive potash application
None of these
✅ The correct answer is option A.
108. Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the
Presence of an inert atmosphere
Presence of a reducing atmosphere
Absence of air
Presence of an oxidising atmosphere
✅ The correct answer is option C.
109. 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.
110. 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.