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NEET Chemistry Metallurgy / धातुकर्म Question Bank Self Evaluation Test - General Principals and Process of Isolation of Elements

  • question_answer
    The method of zone refining of metals is based on the principle of:

    A) Greater solubility of the impurity in the molten state than in the solid

    B) Greater mobility of the pure metal than that of the impurity

    C) Higher melting point of the impurity than that of the pure metal

    D) Greater noble character of the solid metal than that of the impurity

    Correct Answer: A

    Solution :

    [a] Zone refining is based on the difference in solubility of impurities in molten and solid state of  the metal. This method is used for obtaining metals of very high purity.


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