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Chemical Engineering :: Chemical Process

  1. Sulphur addition in soap is done to

  2. A.
    improve the soap texture.
    B.
    cure pimples & dandruff.
    C.
    fasten lather formation.
    D.
    increase its cleansing action.

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  3. Phosphate rock is a raw material for the manufacture of

  4. A.
    phosphoric acid
    B.
    phosphorous
    C.
    superphosphates
    D.
    all (a), (b) and (c)

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  5. Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

  6. A.
    poor oxidation stability and high gum forming tendency.
    B.
    greater tendency of decomposition at elevated temperature.
    C.
    hydrolysis tendency in presence of water.
    D.
    all (a), (b) and (c).

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  7. Which of the following is not a raw material used for the manufacture of ordinary glass?

  8. A.
    Iron oxide
    B.
    Soda ash
    C.
    Limestone
    D.
    Silica

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  9. Esterification reaction

  10. A.
    produces soap.
    B.
    is reversible.
    C.
    is a reaction between an alcohol and an organic acid.
    D.
    all (a), (b) and (c).

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  11. In sulphate pulp manufacture, the pressure and temperature in the digestor is

  12. A.
    10 atm., 800 °C
    B.
    10 atm., 170-180°C
    C.
    1 atm., 170 - 180°C
    D.
    l atm., 800°C

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  13. Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of

  14. A.
    calcium sulphate
    B.
    sodium chloride
    C.
    sodium sulphate
    D.
    magnesium chloride.

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  15. Pick out the endothermic reaction out of the following.

  16. A.
    C+O2 = CO
    B.
    CO + 3H2 = CH4 + H2O
    C.
    CaCO3 = CaO + CO2
    D.
    CO +O2 = CO2

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  17. Pasteurisation of milk means

  18. A.
    removal of fatty and albuminous substance from it.
    B.
    killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
    C.
    inhibiting the growth of micro-organisms without killing them.
    D.
    none of these.

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  19. Fusion of bauxite and __________ produces high alumina cement.

  20. A.
    alum
    B.
    limestone
    C.
    coke
    D.
    quartz

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