A) poling
B) galvanizing
C) pickling
D) anodizing
Correct Answer: C
Solution :
Poling: This method is used for refining of the metals which contain their own oxides as impurity, e.g.,\[C{{u}_{2}}O\]in blister copper. Galvanising: When iron is coated with Zn to prevent rusting is called galvanisation. Pickling: Removal of basic oxide from metal before electroplating is known as pickling.
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