Fertiliser Technology problems
- 1. Potassic fertiliser is graded based on its __________ content.
Options- A. KCl
- B. K2O
- C. KNO3
- D. K2SO4 Discuss
Correct Answer: K2O
- 2. Fertiliser value of a nitrogeneous fertiliser is expressed in terms of its __________ content.
Options- A. N2
- B. KNO3
- C. NO2
- D. NHO3 Discuss
Correct Answer: N2
- 3. Pick out the wrong statement.
Options- A. Dehydration of ammonium carbamate to produce urea is endothermic.
- B. Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable.
- C. Gypsum (CaSO4. 2H2O) is obtained as a by-product in the wet process for manufacture of ortho-phosphoric acid.
- D. Phosphate rock when reacted with dilute H2SO4 produces superphosphate. Discuss
Correct Answer: Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable.
- 4. Maximum nitrogen percentage is in
Options- A. ammonium sulphate.
- B. calcium ammonium nitrate.
- C. urea.
- D. liquid ammonia. Discuss
Correct Answer: liquid ammonia.
- 5. Electric furnace method for production of phosphorous uses phosphate rock
Options- A. and phosphoric acid
- B. and coke
- C. and sulphuric acid
- D. silica and coke Discuss
Correct Answer: silica and coke
- 6. Reaction of phosphate rock with 98% H2SO4 produces
Options- A. orthophosphoric acid
- B. superphosphate
- C. white phosphorous
- D. none of these Discuss
Correct Answer: orthophosphoric acid
- 7. A fertiliser contains 82% N2. It could be
Options- A. urea
- B. liquid NH3
- C. ammonium nitrate
- D. none of these Discuss
Correct Answer: liquid NH3
- 8. Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis?
Options- A. H2 separation from coke oven gas
- B. Steam reforming of naphtha
- C. Cracking of natural gas
- D. Electrolysis of water Discuss
Correct Answer: Electrolysis of water
- 9. Ammonia synthesis reaction is
Options- A. exothermic
- B. endothermic
- C. autocatalytic
- D. none of these Discuss
Correct Answer: exothermic
- 10. Maximum stability of white phosphorous is at
Options- A. very high pressure
- B. atmospheric pressure
- C. room temperature
- D. >600°C Discuss
Correct Answer: >600°C
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