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Chemical Engineering :: Chemical Process

  1. Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.

  2. A.
    mechanical
    B.
    sulphate/kraft
    C.
    sulphite
    D.
    neutral sulphite semi-chemical

  3. __________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.

  4. A.
    Bauxite
    B.
    Limestone
    C.
    Quartz
    D.
    Manganese

  5. Gun powder uses

  6. A.
    sulphur
    B.
    charcoal
    C.
    potassium nitrate
    D.
    all (a), (b), & (c)

  7. Dichloro diphenyl __________ is the full form of DDT (an insecticide).

  8. A.
    tetrachloroethane
    B.
    trichloroethane
    C.
    tetrachloromethane
    D.
    trichloromethane

  9. The basic difference between vegetable oils and fats is in their

  10. A.
    density
    B.
    chemical properties
    C.
    physical state
    D.
    composition

  11. Which of the following is not a food additive?

  12. A.
    Citric acid
    B.
    Invertage
    C.
    Benzoyl peroxide
    D.
    Ammonium chloride

  13. Alum is commercially produced from

  14. A.
    gypsum
    B.
    feldspar
    C.
    galena
    D.
    bauxite

  15. CaO is called

  16. A.
    quick lime
    B.
    slaked lime
    C.
    limestone
    D.
    calcite

  17. Starting raw material for the manufacture of maleic anhydride is

  18. A.
    n-butene
    B.
    benzene
    C.
    either (a) or (b)
    D.
    neither (a) nor (b)

  19. Pick out the wrong statement.

  20. A.
    Fibrillation of fibre during paper manufacture is done to develop the strength in paper.
    B.
    Alkali consumption in digestion/cooking of bamboo is measured in terms of permangnate number.
    C.
    Bagasse fibre contains both lignin & cellulose.
    D.
    Presence of sodium sulphate in pulp makes the pulp bleachability poor.