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Chemical Engineering :: Chemical Process

  1. __________ is an ore of lead.

  2. A.

     Quartz

    B.

     Galena

    C.

     Siderite

    D.

     Chalcopyrite


  3. 20% oleum means that in 100 kg oleum, there are 20 kg of

  4. A.

     SO₃ and 80kg of H₂SO₄

    B.

     H₂SO₄ and 80kg of SO₃

    C.

     SO₃ for each 100 kg of H₂SO₄

    D.

     None of these


  5. 10% oleum comprises of 10% free

  6. A.

     SO₂

    B.

     H₂SO₃

    C.

     SO₃

    D.

     H₂SO₄


  7. The catalyst used in the production of elemental sulphur from H₂S (by oxidation-reduction) is

  8. A.

     Alumina

    B.

     Silica gel

    C.

     Platinum

    D.

     Nickel


  9. In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because

  10. A.

     SO₃ gas is sparingly soluble in water

    B.

     Water forms an acid mist, which is difficult to absorb

    C.

     The purity of acid is affected

    D.

     Scale formation in the absorber is to be avoided


  11. 99.5% purity oxygen is used in

  12. A.

     Cutting and welding by oxy-acetylene flame

    B.

     Hospitals for medicinal purposes

    C.

     Gas masks and artificial breathing apparatus

    D.

     All of the above


  13. Baking soda is chemically represented by

  14. A.

     Na₂CO₃

    B.

     NaHCO₃

    C.

     Na₂CO₃.H₂O

    D.

     Na₂CO₃.10H₂O


  15. Washing soda is chemically represented by

  16. A.

     Na₂CO₃

    B.

     Na₂CO₃.H₂O

    C.

     Na₂CO₃.10H₂O

    D.

     NaHCO₃


  17. Pick out the wrong statement.

  18. A.

     Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively

    B.

     Protein catalysts are called enzymes

    C.

     The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes

    D.

     Total sugar content in molasses is about 10%


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

  20. A.

     Density

    B.

     Chemical properties

    C.

     Physical state

    D.

     Composition