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Chemical Engineering :: Chemical Process

  1. Commercial production of calcium carbide requires limestone and __________ as raw materials.

  2. A.
    coke
    B.
    sand
    C.
    soda ash
    D.
    fuel oil

  3. Which one of the following is not likely to be a constituent of vegetable oils ?

  4. A.
    Citric acid
    B.
    Oleic acid
    C.
    Stearic acid
    D.
    Glycerol

  5. Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and

  6. A.
    sulphuric acid
    B.
    phosphoric acid
    C.
    hydrochloric acid
    D.
    hydroflouric acid

  7. The process involved in converting rubber into a thin sheet or coating it on fabric is called

  8. A.
    extrusion
    B.
    mastication
    C.
    calendering
    D.
    valcanisation

  9. Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.

  10. A.
    endothermic
    B.
    exothermic
    C.
    irreversible
    D.
    both (b) and (c)

  11. Air used in aerobic fermentation must be sterilized, otherwise the

  12. A.
    recovery of product will be difficult.
    B.
    contamination of pure culture would result.
    C.
    uniformity of product cannot be achieved.
    D.
    none of these.

  13. Alkylbenzene sulfonate (ABS) is a

  14. A.
    detergent
    B.
    rubber
    C.
    pesticide
    D.
    polyester

  15. High temperature carbonisation of coal produces

  16. A.
    inferior coke compared to low temperature carbonisation.
    B.
    less of gases compared to liquid products.
    C.
    larger quantity of tar compared to low temperature carbonisation.
    D.
    none of these.

  17. Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.

  18. A.
    7-14 and 14-30
    B.
    7-14 and 40-50
    C.
    14 - 30 and 40-50
    D.
    10 - 20 and 40 - 50

  19. Setting of plaster of paris is accompanied with

  20. A.
    hydration
    B.
    dehydration
    C.
    hydrolysis
    D.
    loss of CO2