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

  • question_answer
    In electro-refining of metal the impure metal is made the anode and a strip of pure metal, the cathode, during the electrolysis of an aqueous solution of a complex metal salt. This method cannot be used for refining of

    A) silver                            

    B) copper

    C) aluminium       

    D) sodium

    Correct Answer: D

    Solution :

    [d] Na reacts vigorously with water (exothermic process)


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