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Chemical Engineering :: Chemical Process

  1. The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

  2. A.

     Dilute H₂SO₄

    B.

     Oleum

    C.

     Ultraviolet light

    D.

     None of these


  3. Which of the following is not produced commercially from sea water?

  4. A.

     Magnesium & potassium compounds

    B.

     Common salt

    C.

     Bromine

    D.

     Iodine


  5. Dacron (or terylene) fibres as compared to nylon's fibres have

  6. A.

     Better heat & acid resistant properties

    B.

     Poorer resistance to alkalis

    C.

     Poorer dyeability

    D.

     All of the above


  7. In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst

  8. A.

     Gives higher conversion efficiency

    B.

     Has a longer life and is not poisoned by arsenic

    C.

     Handles lower SO₂ content gas (7 -10% SO₂), thus increasing the capital cost of the plant

    D.

     All of the above


  9. Which of the following contains least amount of N₂?

  10. A.

     Coke oven gas

    B.

     Blast furnace gas

    C.

     Producer gas

    D.

     Water gas (blue gas)


  11. __________ is used as a flux in the smelting of copper ore like chalcopyrite.

  12. A.

     Coke breeze

    B.

     Lime powder

    C.

     Silica/quartz

    D.

     Dolomite


  13. A unit operation is exemplified by the process of

  14. A.

     Reduction

    B.

     Desorption

    C.

     Nitration

    D.

     Combustion


  15. 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

  16. A.

     Calcium sulphate

    B.

     Sodium chloride

    C.

     Sodium sulphate

    D.

     Magnesium chloride


  17. Which of the following is an ore of iron?

  18. A.

     Galena

    B.

     Chalcopyrite

    C.

     Hematite

    D.

     Bauxite


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

  20. A.

     Tetrachloroethane

    B.

     Trichloroethane

    C.

     Tetrachloromethane

    D.

     Trichloromethane