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Chemical Process - Section-15
  1. Pick out the wrong statement. Iodine value of an oil or fat is

    2. A.

     The number of grams of iodine taken up by 100 gm of oil or fat
    B.

     A measure of its unsaturation
    C.

     Helpful in findings its adulteration & its suitability for making soap
    D.

     Independent of the type of oil, whether it is drying or non-drying

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  2. Presence of sodium tripolyphosphate (an additive) in synthetic detergent

    3. A.

     Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)
    B.

     Inhibits its corrosive effects
    C.

     Does not allow redeposition of dirt on the cleaned surface
    D.

     None of these

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  3. Use of hydrated lime in water treatment

    4. A.

     Before filtration, reduces the bacterial load on filters
    B.

     After filtration, combats the corrosive-ness of water due to the presence of O₂ & CO₂
    C.

     Is to adjust the pH value
    D.

     All of the above

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  4. The drug used in contraceptives is

    5. A.

     Sulphadizene
    B.

     Mestranol
    C.

     Methyl salicylate
    D.

     Pencillin

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  5. Nitrile rubber is produced by the polymerisation of

    6. A.

     Acrylonitrile and butadiene
    B.

     Acrylonitrile and styrene
    C.

     Isobutylene and isoprene
    D.

     None of these

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  6. Helium is produced on commercial scale from

    7. A.

     Air
    B.

     Natural gas
    C.

     Coke oven gas
    D.

     None of these

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  7. __________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.

    8. A.

     Bauxite
    B.

     Limestone
    C.

     Quartz
    D.

     Manganese

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  8. Ore concentration by froth floatation utilises the __________ of ore particles.

    9. A.

     Density difference
    B.

     Wetting characteristics
    C.

     Terminal velocities
    D.

     None of these

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  9. Separation of fresh water from sea water can be done by the __________ operation.

    10. A.

     Osmosis
    B.

     Reverse osmosis
    C.

     Absorption
    D.

     Adsorption

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  10. Bisphenol A is produced by the condensation of acetone with

    11. A.

     Formaldehyde
    B.

     Ethyl alcohol
    C.

     Diethyl ether
    D.

     Phenol

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