Q.

Regarding van Arkel process, correct statements areA) It removes nitrogen and oxygen present in metals like Zirconium and VanadiumB) Impure metal is heated with IodineC) An ionic metal iodide is formedD) Volatile metal iodide decomposes at 1800 K

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a

A,B,C,D

b

A,B,D only

c

B,C,D only

d

A,C only

answer is B.

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Detailed Solution

When impure metal is heated with iodine in an evacuated vessel, a volatile covalent metal iodide is formed. The metal iodide decomposes on electrically heated tungsten filament at 1800 K to give pure metal. During this process, oxygen and nitrogen are removed.Zrimpure+2I2→ZrI4→1800 kZrpure+2I2
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