171. Action of phosphoric acid on rock phosphate produces
Superphosphate
Triple superphosphate
Nitrophosphate
Diammonium phosphate
✅ The correct answer is option B.
Fertilizer Technology MCQs
172. 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.
173. 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.
174. Tricresyl phosphate is chemically represented as
(CH₃ C₆ H₄)₃ PO₄
Ca₁₀(PO₄)3F₆
(NH₄)₂HPO₄
NH₄H₂PO₄
✅ The correct answer is option A.
175. Ammonium nitrate is
Having about 40% N₂
Not hygroscopic
Not prone to explosive thermal decomposition
Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer
✅ The correct answer is option D.
176. Triple superphosphate which contains about 46% P₂O₅ is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration.
25-28
52-54
75-80
> 98
✅ The correct answer is option B.
177. Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.
10
25
50
80
✅ The correct answer is option B.
178. Sodium tri poly phosphate (STPP) is chemically represented as
Na₅P3O₁₀
Na₄P3O₈
Na₃P4O₆
Na₂PO₄
✅ The correct answer is option A.
179. Electric process as compared to wet process (for the manufacture of phosphoric acid)
Can use only high grade phosphate rock
Is used less frequently
Produces a valuable by-product called gypsum
Is weak acid process
✅ The correct answer is option B.
180. Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition?
Electrolysis of water
Cryogenic removal of H₂ from coke oven gas
Steam reforming of naphtha
Natural gas cracking
✅ The correct answer is option A.