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Chemical Engineering :: Fertiliser Technology

  1. Ammonium sulphate fertiliser is

  2. A.
    the highest concentration nitrogenous fertiliser.
    B.
    the best fertiliser for paddy.
    C.
    a basic fertiliser.
    D.
    a neutral fertiliser.

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  3. Lower temperature and large excess of ammonia in urea melt

  4. A.
    increases biuret formation
    B.
    decreases biuret formation
    C.
    is undersirable
    D.
    does not effect biuret formation

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  5. Superphosphate is manufactured by reacting phosphate rock with

  6. A.
    acetic acid
    B.
    sulphuric acid
    C.
    aluminium chloride
    D.
    none of these

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  7. Vetrocoke solution is

  8. A.
    a mixture of K2CO3 and As2O3.
    B.
    K2SO4.
    C.
    a mixture of Na2CO3 and As2O3.
    D.
    Na2SO4.

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  9. In calcium ammonium nitrate (CAN) fertil-ser

  10. A.
    nitrate nitrogen is quick acting
    B.
    ammoniacal nitrogen is quick acting
    C.
    nitrate nitrogen is slower acting
    D.
    none of these

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  11. P2O5 content in triple superphosphate is about __________ percent.

  12. A.
    42-50
    B.
    15-20
    C.
    85-90
    D.
    70-75

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  13. H3PO4 is the chemical formula of __________ phosphoric acid.

  14. A.
    pyro
    B.
    ortho
    C.
    meta
    D.
    none of these

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  15. Heating of orthophosphoric acid to 250°C produces

  16. A.
    metaphosphoric acid
    B.
    pyrophosphoric acid
    C.
    no change in it
    D.
    none of these

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  17. Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the __________ process.

  18. A.
    Haber's
    B.
    Stengel
    C.
    Le-chatlier's
    D.
    Du-pont's

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  19. Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.

  20. A.
    stabilisation
    B.
    increasing the effectiveness
    C.
    improving the strength & heat resistance
    D.
    all a, b & c

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