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Chemical Engineering :: Chemical Process

  1. Anion exchanger is regenerated usually with

  2. A.
    NaOH
    B.
    H2SO4
    C.
    hydrazine
    D.
    alum solution

  3. __________ is the major constituent of the Portland cement.

  4. A.
    Calcium carbonate
    B.
    Calcium oxide
    C.
    Tricalcium silicate
    D.
    Calcium sulphate

  5. Catalytic oxidation of naphthalene produces

  6. A.
    styrene
    B.
    phenol
    C.
    phthalic anhydride
    D.
    none of these

  7. Parathion and Malathion are

  8. A.
    pesticides.
    B.
    plasticisers for unsaturated polysters.
    C.
    pain-relieving drugs (analgesic).
    D.
    tranquilisers.

  9. Transparent soaps (e.g. Pears) are

  10. A.
    usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency.
    B.
    metallic soaps with frothing agent and free stearic acid to achieve transparency.
    C.
    metallic soaps with frothing agent from which glycerine has not been recovered.
    D.
    none of these.

  11. Dehydrogenation of ethyl benzene produces

  12. A.
    styrene
    B.
    naphthalene
    C.
    phenol
    D.
    benzoic acid

  13. Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces

  14. A.
    nylon-6
    B.
    dacron
    C.
    polyester
    D.
    PVC

  15. Lindane is

  16. A.
    not a fumigant.
    B.
    BHC (Benzene Hexa Chloride) containing 99% γ-isomer.
    C.
    a by-product of BHC manufacture.
    D.
    both(b) and (c).

  17. Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate

  18. A.
    is prone to thermal decomposition.
    B.
    has high water solubility and is unstable.
    C.
    is soluble in ammonium chloride and potassium chloride solution.
    D.
    all (a), (b) and (c).

  19. Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?

  20. A.
    Sodium silicate
    B.
    Sodium borate
    C.
    Sodium tripolyphosphate (STPP)
    D.
    Caustic soda