Discussion
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- Question
Which is the most suitable fertiliser for paddy?
Options- A. CAN
- B. Ammonium sulphate
- C. Ammonium nitrate
- D. Superphosphate
- Correct Answer
- Ammonium sulphate
- 1. Phosphorus vapour comprises of
Options- A. P
- B. P2
- C. P3
- D. P4 Discuss
- 2. 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
- 3. Mass transfer co-efficient of liquid is
Options- A. affected more by temperature than that for gases.
- B. affected much less by temperature than that for gases.
- C. not affected by the temperature.
- D. none of these. Discuss
- 4. The rate of solid-liquid extraction is limited by the
Options- A. phase change of the solute as it dissolves in the solvent.
- B. diffusion of the solute through the solvent in the pores to the outside of the particle.
- C. diffusion of the solute from the solution in contact with the particle to the main bulk of the solution.
- D. all 'a', 'b' & 'c'. Discuss
- 5. Which of the following plays an important role in problems of simultaneous heat and mass transfer?
Options- A. Lewis number
- B. Schmidt number
- C. Prandtl number
- D. Sherwood number Discuss
- 6. Superphosphate is manufactured by reacting phosphate rock with
Options- A. acetic acid
- B. sulphuric acid
- C. aluminium chloride
- D. none of these Discuss
- 7. Commercial fertilisers are available mostly in the form of
Options- A. powder
- B. grannules
- C. lumps
- D. flakes Discuss
- 8. 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
- 9. Ammonia synthesis gas is produced from natural gas by
Options- A. thermal cracking
- B. steam reforming
- C. partial oxidation
- D. hydrogenation Discuss
- 10. 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
Fertiliser Technology problems
Search Results
Correct Answer: P4
Correct Answer: all a, b & c
Correct Answer: affected more by temperature than that for gases.
Correct Answer: all 'a', 'b' & 'c'.
Correct Answer: Lewis number
Correct Answer: sulphuric acid
Correct Answer: grannules
Correct Answer: in liquid phase
Correct Answer: steam reforming
Correct Answer: pyrophosphoric acid
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