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Chemical Engineering :: Chemical Process

  1. Pick out the wrong statement.

  2. A.

     Conversion of SO₂ to SO₃ in Monsanto-4 pass converter is about 98%

    B.

     The chemical formula of oleum is H₂S₂O₇, which is formed by saturating sulphuric acid with sulphur trioxide

    C.

     Vitriol oil is nothing but technical sulphuric acid

    D.

     Decomposition of sulphuric acid on heating does not start before its boiling


  3. Electric bulbs are made of __________ glass.

  4. A.

     Jena

    B.

     Flint

    C.

     Crookes

    D.

     Pyrex


  5. __________ is produced using molasses as the starting raw material.

  6. A.

     Methyl alcohol

    B.

     Ethyl alcohol

    C.

     Benzol

    D.

     Dimethyl ether


  7. Sucrose content in cane sugar may be around __________ percent.

  8. A.

     50

    B.

     70

    C.

     80

    D.

     95


  9. Percentage of alcohol in beer may be around __________ percent.

  10. A.

     2-8

    B.

     18-23

    C.

     27-32

    D.

     1-4


  11. Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because

  12. A.

     Its calorific value is very less

    B.

     Tar neutralises the residual acids present in pitch

    C.

     It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop

    D.

     All of the above


  13. Aryl benzene sulphonate (ABS) is a

  14. A.

     Detergent

    B.

     Plasticiser for unsaturated polyester

    C.

     Starting material for the synthesis of glycerine

    D.

     Coating ingredient for photographic film


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

  16. A.

     Sodium silicate

    B.

     Sodium borate

    C.

     Sodium tripolyphosphate (STPP)

    D.

     Caustic soda


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

  18. A.

     Dilute H₂SO₄

    B.

     Oleum

    C.

     Ultraviolet light

    D.

     None of these


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

  20. A.

     Magnesium & potassium compounds

    B.

     Common salt

    C.

     Bromine

    D.

     Iodine