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Chemical Engineering :: Fertiliser Technology

  1. Gas based fertiliser plants use

  2. A.

     Natural gas as a source of hydrogen

    B.

     Natural gas as heating medium

    C.

     Coal gas as a source of hydrogen

    D.

     Coal gas as heating medium

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  3. Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because

  4. A.

     It is hygroscopic and explosive in nature

    B.

     It is highly acidic in nature

    C.

     It is a liquid at room temperature

    D.

     Its nitrogen content is very less

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

  6. A.

     Phosphoric

    B.

     Nitric

    C.

     Sulphuric

    D.

     Hydrochloric

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  7. Which is a catalyst promoter used in catalytic ammonia synthesis reaction?

  8. A.

     Al₂O₃

    B.

     Cr₂O₃

    C.

     K₂O

    D.

     MnO

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  9. Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature

  10. A.

     Rate of reaction is very low

    B.

     Very high pressure is required resulting in costly pressure vessel

    C.

     Space velocity of gas is very low resulting in decreased conversion

    D.

     None of these

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  11. Catalyst used in Haber's process for ammonia production is

  12. A.

     Reduced iron oxide

    B.

     Nickel

    C.

     Vanadium pentoxide

    D.

     Silica gel

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  13. Chemical formula of biuret is

  14. A.

     NH₂.CO.NH₂

    B.

     NH₃.COO.NH₃

    C.

     NH₂CONHCONH₂

    D.

     NH₄COONH₂

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  15. Action of phosphoric acid on rock phosphate produces

  16. A.

     Superphosphate

    B.

     Triple superphosphate

    C.

     Nitrophosphate

    D.

     Diammonium phosphate

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  17. Calcium ammonium nitrate (CAN) is

  18. A.

     A mixed fertiliser

    B.

     A straight fertiliser

    C.

     A complex fertiliser

    D.

     Not a fertiliser ; it is an explosive

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  19. Which of the following gasifiers can be attached to coal based fertiliser plants?

  20. A.

     Lurgi (high pressure) gasifier

    B.

     Kopper-Totzek gasifier

    C.

     Gasifier working at 20 atm

    D.

     Gasifier working at 40 atm

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