Fertiliser Technology problems
- 1. Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.
Options- A. stabilisation
- B. increasing the effectiveness
- C. improving the strength & heat resistance
- D. all a, b & c Discuss
Correct Answer: all a, b & c
- 2. Phosphorus vapour comprises of
Options- A. P
- B. P2
- C. P3
- D. P4 Discuss
Correct Answer: P4
- 3. Which is the most suitable fertiliser for paddy?
Options- A. CAN
- B. Ammonium sulphate
- C. Ammonium nitrate
- D. Superphosphate Discuss
Correct Answer: Ammonium sulphate
- 4. Superphosphate is manufactured by reacting phosphate rock with
Options- A. acetic acid
- B. sulphuric acid
- C. aluminium chloride
- D. none of these Discuss
Correct Answer: sulphuric acid
- 5. Commercial fertilisers are available mostly in the form of
Options- A. powder
- B. grannules
- C. lumps
- D. flakes Discuss
Correct Answer: grannules
- 6. 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
Correct Answer: in liquid phase
- 7. Ammonia synthesis gas is produced from natural gas by
Options- A. thermal cracking
- B. steam reforming
- C. partial oxidation
- D. hydrogenation Discuss
Correct Answer: steam reforming
- 8. 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
Correct Answer: pyrophosphoric acid
- 9. 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
Correct Answer: a complex fertiliser
- 10. Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.
Options- A. reversible
- B. catalytic
- C. exothermic
- D. endothermic Discuss
Correct Answer: endothermic
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