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Chemical Engineering :: Fertiliser Technology

  1. Phosphorus vapour comprises of

  2. A.
    P
    B.
    P2
    C.
    P3
    D.
    P4

  3. Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.

  4. A.
    50-80
    B.
    250-400
    C.
    1000-1200
    D.
    800-900

  5. Commercial fertilisers are available mostly in the form of

  6. A.
    powder
    B.
    grannules
    C.
    lumps
    D.
    flakes

  7. Pick out the wrong statement.

  8. A.
    All the nitrogenous fertilisers are not soluble in water.
    B.
    A straight fertiliser contains only one nutrient.
    C.
    Calcium cynamide is used as weed killer in onion fields.
    D.
    The phosphorous nutrient makes the plant stem stronger and increases its branches.

  9. Ammonia synthesis gas is produced from natural gas by

  10. A.
    thermal cracking
    B.
    steam reforming
    C.
    partial oxidation
    D.
    hydrogenation

  11. Catalyst used in the manufacture of NH3 by Haber's process is finely divided

  12. A.
    nickel
    B.
    iron
    C.
    vanadium pentoxide
    D.
    alumina

  13. Red phosphorous is changed into white phosphorous by

  14. A.
    heating in presence of light.
    B.
    melting under pressure.
    C.
    vaporisation followed by condensation.
    D.
    none of these.

  15. Urea is represented as

  16. A.
    NH2.CO.NH2
    B.
    NH3CO.CH3
    C.
    NH.CO2.NH
    D.
    NH3.CO2.NH3

  17. Two gas based fertiliser plants are located in

  18. A.
    Maharashtra and Gujarat
    B.
    Maharashtra and Orissa
    C.
    Gujarat and Madhya Pradesh
    D.
    Jharkhand and Chattisgarh

  19. Fertiliser plants get their N2 requirements

  20. A.
    by fractionation of liquified air.
    B.
    by dissociating oxides of nitrogen.
    C.
    from coal gas (coke oven gas).
    D.
    from producer gas.