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UPSC Chemistry Acids, Bases and Salts / अम्ल, क्षार एवं लवण Question Bank Acids, Bases, Salts and Metals

  • question_answer
          Removal of impurities from ore is known as -

    A) crushing and grinding

    B) concentration of ore

    C) calcination

    D) roasting

    Correct Answer: B

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