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General Principle of Extraction of Metal Test - 4

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General Principle of Extraction of Metal Test - 4
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  • Question 1
    4 / -1

    Which one of the following is an ore of silver

    Solution

    Argentite is ore with formula Ag2​S

    Stibnite is ore with formula Sb2​S3​

    Haemetite is ore with formula Fe2​O3​

    Bauxite is ore with formula Al2​O3​.2H2​O

     

  • Question 2
    4 / -1

    Important ore of zinc is:

    Solution

    Calamine is ZnCO3​, Cryolite is Na3​AlF6​, Gibbsite isAl(OH)3​ and Malachite is CuCO3​.Cu(OH)2​

    Out of the above ores, Calamine is the only ore of Zinc. 

     

  • Question 3
    4 / -1

    All ores are minerals, while all minerals are not ores because

    Solution

    All ores are minerals, while all minerals are not ores because the metal can't be extracted economically from all the minerals.

     

  • Question 4
    4 / -1

    Corundum is an ore of:

    Solution

    Corundum is an ore of aluminium. It's formula is Al2​O3​.

     

  • Question 5
    4 / -1

    Which ore contains both iron and copper?

    Solution

    1) Cuprite → Cu2​O

    2) Chalcocite → Cu2​S

    3) Chalcopyrite → CuFeS2​

    4) Malachite → Cu(OH)2​.CuCO3

     

  • Question 6
    4 / -1

    Cassiterite is concentrated by:

    Solution

    Cassiterite is tin stone (SnO2​) which is non-magnetic and contains wolframite, FeWO4​ (magnetic impurities). These are separated by electromagnetic separation.

     

  • Question 7
    4 / -1

    Froth floatation process for the concentration of sulphide ores is an illustration of the practical application of:

    Solution

    Froth flotation process for the concentration of sulphide ores illustrates the application of adsorption because in this process ores are adsorbed on the surface of the froth collector.

     

  • Question 8
    4 / -1

    Iron ore is concentrated by

    Solution

    As Iron ore contains magnetic part (Fe2​O3​) and non-magnetic part (gangue). Hence, Magnetic Separation is used for concentration of Iron Ore.

     

  • Question 9
    4 / -1

    One of the following metals forms a volatile compound and this property is taken advantage for its extraction. This metal is

    Solution

    Nickel; Ni + 4CO → [Ni (CO)4​]( volatile ) 

     

  • Question 10
    4 / -1

    Bauxite ore is concentrated by

    Solution

    In this powered ore is treated with a suitable reagent which can dissolve the ore but not the impurities.

     

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