Q.

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

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a

Zr and Ti

b

Ag and Au

c

Ni and Fe

d

Ga and In

answer is A.

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Detailed Solution

Zr and Ti are purified by van - Arkel methodZr+2I2→600oCZrI4→1800oC Impure Zr Pure +2I2This method is useful for removing all the oxygen and nitrogen present in the form of impurity in certain metals like Zr and Ti.
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