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JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank Compounds of Transitional Elements

  • question_answer
    Which process of purification is represented by the following scheme\[\underset{\text{impure}}{\mathop{Ti}}\,+2{{I}_{2}}\xrightarrow{{{250}^{o}}C}Ti{{I}_{4}}\xrightarrow{{{1400}^{o}}C}\underset{\text{pure}}{\mathop{Ti}}\,+{{I}_{2}}\] [Kerala PMT 2004]

    A) Cupellation

    B) Poling

    C) Electrolytic refining

    D) Zone refining

    E) Van-Arkel process

    Correct Answer: E

    Solution :

    This scheme take place in Van Arekel process by this process ultrapure metal is prepared, the impure metal is first converted into a volatile stable compound generally iodide(leaving behind the impurities which is then decomposed at a higher temperature to give the pure metal. Metal like titanium, zirconium are purified by this method.


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