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Chemical Engineering :: Chemical Process

  1. __________ is not a constituent of gun powder.

  2. A.

     Carbon

    B.

     Charcoal

    C.

     Sulphur

    D.

     Potassium nitrate


  3. Air used in aerobic fermentation must be sterilized, otherwise the

  4. A.

     Recovery of product will be difficult

    B.

     Contamination of pure culture would result

    C.

     Uniformity of product cannot be achieved

    D.

     None of these


  5. Raw materials used for producing __________ cement does not contain iron oxide.

  6. A.

     Waterproof

    B.

     Slag

    C.

     White

    D.

     Pozzolan


  7. Alum [Al2(SO₄)₃] is used as a coagulant in water treatment to remove

  8. A.

     Colour

    B.

     Turbidity

    C.

     Bacteria

    D.

     All of the above


  9. Glauber's salt is chemically represented by

  10. A.

     Na₂SO₄.10H₂O

    B.

     CaCl(OCl)

    C.

     CaSO₄.H₂O

    D.

     (NH₄)₂SO₄


  11. Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil.

  12. A.

     Drying

    B.

     Semi-drying

    C.

     Non-drying

    D.

     None of these


  13. An alkali metal salt of palmitic acid is known as

  14. A.

     Soap

    B.

     Metallic soap

    C.

     Detergent

    D.

     Alkaloid


  15. Which form of sulphur is the most stable at room temperature?

  16. A.

     Plastic

    B.

     Monoclinic

    C.

     Rhombic

    D.

     Flowers of sulphur


  17. Alcohol percentage in molasses may be around

  18. A.

     10

    B.

     40

    C.

     70

    D.

     85


  19. 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

  20. 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 of the above