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Chemical Engineering :: Fertiliser Technology

  1. Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of

  2. A.
    phosphoric acid.
    B.
    superphosphate.
    C.
    phosphorous.
    D.
    triple superphosphate.

  3. Which of the following does not come under the category of 'micro-nutrient' for plant growth?

  4. A.
    Chlorine
    B.
    Iron
    C.
    Boron
    D.
    Carbon

  5. The composition of fresh feed to the high temperature, high pressure urea autoclave is

  6. 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.

  7. __________ is required more for leafy crops.

  8. A.
    Nitrogen
    B.
    Phosphorous
    C.
    Potassium
    D.
    Carbon

  9. Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the

  10. A.
    osmotic pressure of the soil water becomes less than that of the plant sap.
    B.
    soil becomes too alkaline.
    C.
    osmotic pressure of the soil water becomes higher than that of the plant sap.
    D.
    soil becomes too acidic.

  11. Monte catini process is a widely used process for the manufacture of

  12. A.
    urea
    B.
    calcium ammonium nitrate
    C.
    triple superposphate
    D.
    none of these

  13. Reaction of __________ acid with phosphate rock produces superphosphates.

  14. A.
    hydrochloric
    B.
    sulphuric
    C.
    nitric
    D.
    phosphoric

  15. Reaction of nitric acid and sulphuric acid with phosphate rock produces

  16. A.
    nitrophosphate
    B.
    diammonium phosphate
    C.
    tricresyl phosphate
    D.
    tributyl phosphate

  17. In the manufacture of orthophosphoric acid by strong H2SO4 leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable

  18. A.
    CaSO4 .H2O and CaSO4 crystals
    B.
    pyrophosphoric acid
    C.
    metaphosphoric acid
    D.
    all (a), (b) and (c).

  19. Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by

  20. A.
    adsorption on palladium.
    B.
    cryogenic operations (low temperature cooling).
    C.
    absorption (using ethanolamine or pyragalloll solution).
    D.
    none of these.