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प्रश्न
Explain the following:
Vapour phase refining method is used for the purification of Ti.
उत्तर
In the process of vapour refining an impure metal is treated with a suitable reagent to form volatile compound which is decomposed at high temperature to get pure metal. Here, Ti can form volatile compound (I1I4) with the iodine and the compound is easily decomposable to give extra pure Ti. So, the recovery is easy.
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संबंधित प्रश्न
Name the common elements present in the anode mud in electrolytic refining of copper. Why are they so present ?
Write the chemical equations involved in van Arkel method for refining zirconium metal.
Outline the principles behind the refining of metals by the following methods:
Chromatographic method
Name the method of refining which is Used to obtain low boiling metal.
Why is an external emf of more than 2.2 V required for the extraction of \[\ce{Cl2}\] from brine?
Give two requirements for vapour phase refining.
Match the items of Column I with the items of Column II and assign the correct code:
| Column I | Column II |
| (A) Coloured bands | (1) Zone refining |
| (B) Impure metal to volatile complex | (2) Fractional distillation |
| (C) Purification of Ge and Si | (3) Mond Process |
| (D) Purification of mercury | (4) Chromatography |
| (5) Liquation |
Assertion: Zirconium can be purificed by Van Arkel method.
Reason: ZrI4 is volatile and decomposes at 1800 K.
Describe a method for refining nickel.
Describe a method for refining nickel.
