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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 28

  • question_answer
    Consider the following metallurgical process : Metal sulphide \[\xrightarrow[{}]{x}\]Metal oxide \[\xrightarrow[{}]{y}\] Impure metal \[\xrightarrow[{}]{z}\]Pure metal x, y and z are respectively

    A) roasting, smelting, electrolysis

    B) roasting, calcination, smelting

    C) calcination, auto-reduction, bassemerisation

    D) none of the above.

    Correct Answer: A

    Solution :

    [a] : The conversion of metal sulphide to metal oxide involves the process of roasting (i.e., x is roasting). The metal oxides can then be converted to impure metal by reduction, i.e., 'y is smelting. The conversion of impure metal to pure metal involves a process of purification. Thus, it is electrolysis.


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