1.

Which of the following option is incorrect

Answer»

B is purified by Van Arkel METHOD because `BI_(3)` is volatile iodile.
Si and Ge are purified by ZONE refining method.
Chemical reaction:`Fe_(2)O_(3)+Al to Al_(2)O_(3)+Fe`
("its an endothermic process)
The affinity of `CU^(2+)` towards `S^(-2)` is more than `O^(-2)`

Answer :C


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