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  5. Occurence and Extraction of Metals

Railways General Science & Technology Occurence and Extraction of Metals Sample Paper Occurence and Extraction of Metals Sample Test Paper-18

  • question_answer
    The sulphide ores of metals are concentrated by

    A)  Cupellation      

    B)  electrolysis

    C)  Froth flotation

    D)  calcination

    Correct Answer: C

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