Discussion
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- Question
Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.
Options- A. reversible
- B. catalytic
- C. exothermic
- D. endothermic
- Correct Answer
- endothermic
- 1. Calcium ammonium nitrate (CAN) is
Options- A. a mixed fertiliser
- B. a straight fertiliser
- C. a complex fertiliser
- D. not a fertiliser ; it is an explosive Discuss
- 2. Heating of orthophosphoric acid to 250°C produces
Options- A. metaphosphoric acid
- B. pyrophosphoric acid
- C. no change in it
- D. none of these Discuss
- 3. Ammonia synthesis gas is produced from natural gas by
Options- A. thermal cracking
- B. steam reforming
- C. partial oxidation
- D. hydrogenation Discuss
- 4. Urea is formed only
Options- A. in liquid phase
- B. in vapour phase
- C. at very high temperature
- D. at very low pressure (vacuum) Discuss
- 5. Commercial fertilisers are available mostly in the form of
Options- A. powder
- B. grannules
- C. lumps
- D. flakes Discuss
- 6. Reaction of dilute sulphuric acid with phosphate rock produces
Options- A. phosphoric acid
- B. superphosphate
- C. triple superphosphate
- D. gypsum Discuss
- 7. During conversion of ammonium carbamate into urea, presence of large excess of water
Options- A. increases the yield of urea.
- B. adversely affects the yield of urea.
- C. reduces the evaporator load by diluting the urea solution.
- D. does not affect the yield of urea. Discuss
- 8. Fertiliser plant making ammonium sulphate employing gypsum-ammonia reaction (usual practice is to use ammonia and sulphuric acid) is located at
Options- A. Rourkela (under SAIL)
- B. Bokaro (under SAIL)
- C. Sindri (under FCI)
- D. Baroda (under G.S.F.C.) Discuss
- 9. Which of the following does not come under the category of 'secondary nutrient' for plant growth?
Options- A. Calcium
- B. Magnesium
- C. Sulphur
- D. Oxygen Discuss
- 10. Pick out the wrong statement.
Options- A. Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water.
- B. Apatite is the principal material present in phosphate rock which is chemically Ca10 (PO4)6 (F, Cl, OH).
- C. Urea is more hygroscopic than ammonium nitrate.
- D. Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound form. Discuss
Fertiliser Technology problems
Search Results
Correct Answer: a complex fertiliser
Correct Answer: pyrophosphoric acid
Correct Answer: steam reforming
Correct Answer: in liquid phase
Correct Answer: grannules
Correct Answer: phosphoric acid
Correct Answer: adversely affects the yield of urea.
Correct Answer: Sindri (under FCI)
Correct Answer: Oxygen
Correct Answer: Urea is more hygroscopic than ammonium nitrate.
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