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.