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    CBSE

    Subject

    Chemistry
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    NEET Chemistry : General Principles And Processes of Isolation Of Elements

    Multiple Choice Questions

    71.

    Aluminium is obtained by

    • reducing Al2O3 with coke

    • electrolysing Al2O3 dissolved in Na3AlF6

    • reducing Al2O3 with chromium

    • heating alumina with cryolite

    Answer
    • 72.

    Gravity separation process is used for the concentration of:

    • calamine

    • haematite

    • chalcopyrite

    • bauxite

    Answer
    • 73.

    Which of the following is not an ore of magnesium?

    • Magnesite

    • Dolomite

    • Gypsum

    • Carnallite

    Answer
    • 74.

    In Mc Arthur forest method, silver is extracted from the solution of Na[Ag(CN)2] by the use of:

    • Fe

    • Mg

    • Cu

    • Zn

    Answer
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