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BHU PMT BHU PMT (Screening) Solved Paper-2006

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

    A)  Cupellation

    B)  Poling

    C)   Electrolytic refining

    D)  Van-Arkel process

    Correct Answer: D

    Solution :

                     This scheme take place in van-Arkel 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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