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  • Question

  • Triple superphosphate which contains about 46% P2O5 is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration.


  • Options
  • A. 25-28
  • B. 52-54
  • C. 75-80
  • D. > 98

  • Correct Answer
  • 52-54 

    • Fertiliser Technology problems

    Search Results

    • 1. The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is __________ fertiliser.

    • Options
    • A. nitrogenous
    • B. phosphatic
    • C. potassic
    • D. none of these
      • Discuss
    • 2. Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by

    • Options
    • A. adsorption on palladium.
    • B. cryogenic operations (low temperature cooling).
    • C. absorption (using ethanolamine or pyragalloll solution).
    • D. none of these.
      • Discuss
    • 3. P2O5 percentage in the phosphoric acid produced by wet process is about

    • Options
    • A. 10
    • B. 30
    • C. 50
    • D. 70
      • Discuss
    • 4. The composition of fresh feed to the high temperature, high pressure urea autoclave is

    • Options
    • A. excess liquid ammonia and liquefied CO2.
    • B. excess liquid ammonia and compressed CO2 gas.
    • C. liquid ammonia and excess compressed CO2.
    • D. compressed ammonia gas and excess compressed CO2.
      • Discuss
    • 5. Ammonia synthesis gas is produced from fuel oil by

    • Options
    • A. steam reforming
    • B. hydrocracking
    • C. partial oxidation
    • D. hydrogenation
      • Discuss
    • 6. Reaction of nitric acid and sulphuric acid with phosphate rock produces

    • Options
    • A. nitrophosphate
    • B. diammonium phosphate
    • C. tricresyl phosphate
    • D. tributyl phosphate
      • Discuss
    • 7. Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction.

    • Options
    • A. catalytic
    • B. endothermic
    • C. exothermic
    • D. autocatalytic
      • Discuss
    • 8. Fertiliser produced during soda ash manufacture by dual process is ammonium

    • Options
    • A. chloride
    • B. sulphate
    • C. nitrate
    • D. none of these
      • Discuss
    • 9. Fertilizer plant getting its hydrogen requirement partly from coke oven gas is situated at

    • Options
    • A. Rourkela (under SAIL)
    • B. Barauni (under HFC)
    • C. Nangal (under NFL)
    • D. Talchar (under FCI)
      • Discuss
    • 10. Plant tranquillisers

    • Options
    • A. hold back stem growth and halt plants at a desired height.
    • B. cause early maturation of plants.
    • C. accelerate ripening of food and grain.
    • D. produce seedless fruit.
      • Discuss

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