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  • Question
  • H4P2O7 is the chemical formula of __________ phosphoric acid.


  • Options
  • A. pyro
  • B. ortho
  • C. meta
  • D. none of these

  • Correct Answer
  • pyro 


  • Fertiliser Technology problems


    Search Results


    • 1. Triple superphosphate is made by reacting phosphate rock with __________ acid.

    • Options
    • A. phosphoric
    • B. nitric
    • C. sulphuric
    • D. hydrochloric
    • Discuss
    • 2. Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.

    • Options
    • A. 10
    • B. 25
    • C. 50
    • D. 80
    • Discuss
    • 3. Chemical formula of biuret is

    • Options
    • A. NH2.CO.NH2
    • B. NH3.COO.NH3
    • C. NH2CONHCONH2
    • D. NH4COONH2
    • Discuss
    • 4. The optimum size of the ammonia plant is __________ tons/day.

    • Options
    • A. 10
    • B. 100
    • C. 1000
    • D. 1000C.
    • Discuss
    • 5. Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of

    • Options
    • A. comparatively higher pressure drop.
    • B. high cost of the high pressure vessel used for the reactor.
    • C. higher pumping cost.
    • D. chances of entrainment and disturbance of catalyst bed.
    • Discuss
    • 6. Rock phosphate constitutes mainly of

    • Options
    • A. fluorapatite
    • B. di-calcium phosphate
    • C. mono-calcium phosphate
    • D. di-ammonium phosphate
    • Discuss
    • 7. Nitrogen content of urea is about __________ percent.

    • Options
    • A. 10
    • B. 46
    • C. 80
    • D. 94
    • Discuss
    • 8. __________ is the most suitable fertiliser for paddy.

    • Options
    • A. Urea
    • B. Ammonium sulphate
    • C. Superphosphate
    • D. Potassium nitrate
    • Discuss
    • 9. Monte catini process is used for the manufacture of

    • Options
    • A. nitric acid
    • B. phosphoric acid
    • C. urea
    • D. calcium ammonium nitrate (CAN)
    • Discuss
    • 10. Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)

    • Options
    • A. use coal for heating purpose.
    • B. gasify coal to get hydrogen from coal gas.
    • C. use coal as filler in fertiliser.
    • D. use coal as conditioner in fertiliser.
    • Discuss


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