NEET 2011 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)NEET 2011

Not in JEE Main or NEET syllabus

Which of the following pairs of metals is purified by van Arkel method ?

(1)Ga and In
(2)Zr and TiCorrect
(3)Ag and Au
(4)Ni and Fe

Answer: (2)

Solution

The van Arkel method is a vapour-phase refining method used for very pure metals such as Zr and Ti (also Hf, B, Si): the impure metal is heated with iodine to form a volatile iodide, which then decomposes on a hot tungsten filament to give the pure

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Question ID VK-090820