Question
What are amphoteric oxides? Give two examples of amphoteric oxides.
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| Column I | Column II |
| (1) Copper and zinc | (a) Stainless steel |
| (2) Copper and tin | (b) Zinc amalgam |
| (3) Iron, nickel and chromium | (c) Bronze |
| (4) Mercury and zinc | (d) Brass |
| (e) Steel |