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Chemical Engineering :: Fertiliser Technology

Fertiliser Technology - Section 1
Fertiliser Technology - Section 2
Fertiliser Technology - Section 3
Fertiliser Technology - Section 4
Fertiliser Technology - Section 5
Fertiliser Technology - Section-6

  1. Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.

    2. A.
    nutrient supply
    B.
    texture
    C.
    water holding capacity
    D.
    all (a), (b) and (c)

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  2. Plant tranquillisers

    3. 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.

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  3. Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.

    4. A.
    exothermic
    B.
    endothermic
    C.
    autocatalytic
    D.
    catalytic

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

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

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  5. NPK means a __________ fertiliser.

    6. A.
    mixed
    B.
    potassic
    C.
    liquid
    D.
    solid

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  6. Low grade phosphate rock can be used in electrical furnace, because

    7. A.
    of the better CaO/SiO2 balance for slag formation.
    B.
    CaO content is less.
    C.
    it is cheap.
    D.
    it produces low cost product.

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  7. Fertiliser produced during soda ash manufacture by dual process is ammonium

    8. A.
    chloride
    B.
    sulphate
    C.
    nitrate
    D.
    none of these

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  8. In an ammonia plant, the purge off is essential to

    9. A.
    maintain inert gas concentration within a limit.
    B.
    remove excess poisonous gases.
    C.
    maintain H2 : N2 ratio at 3 :1.
    D.
    remove uncondensed ammonia vapour.

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  9. Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits ?

    10. A.
    Nitrogenous fertilisers
    B.
    Phosphatic fertilisers
    C.
    Potassic fertiliser
    D.
    None of these

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  10. Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?

    11. A.
    Iso propyl alcohol
    B.
    Butyl alcohol
    C.
    Toluene
    D.
    Hexane

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