The correct option is Aluminium oxide and zinc oxide.
Explanation
Metal oxides are generally basic in nature, meaning they react with acids to form salt and water. However, certain metal oxides exhibit dual behaviour, showing properties of both acidic and basic oxides. These are termed amphoteric oxides. Such oxides react with both acids and bases to produce salt and water.
Option Analysis
- Aluminium oxide and zinc oxide is Correct: Aluminium oxide ($Al_2O_3$) and Zinc oxide ($ZnO$) are classic examples of amphoteric oxides.
- Reaction with Acid: $Al_2O_3$ reacts with hydrochloric acid to form aluminium chloride and water ($Al_2O_3 + 6HCl \rightarrow 2AlCl_3 + 3H_2O$). Here, it acts as a base.
- Reaction with Base: $Al_2O_3$ reacts with sodium hydroxide to form sodium aluminate and water ($Al_2O_3 + 2NaOH \rightarrow 2NaAlO_2 + H_2O$). Here, it acts as an acid.
- Copper oxide and magnesium oxide is Incorrect: Copper oxide ($CuO$) and Magnesium oxide ($MgO$) are basic oxides. They react with acids but do not typically react with bases to form salts.
- Sodium oxide and potassium oxide is Incorrect: Sodium oxide ($Na_2O$) and Potassium oxide ($K_2O$) are strongly basic oxides (alkalis) that dissolve in water to produce hydroxide ions.
- Calcium oxide and barium oxide is Incorrect: Calcium oxide ($CaO$) and Barium oxide ($BaO$) are basic oxides.
Key Takeaway: Amphoteric oxides, such as Aluminium oxide ($Al_2O_3$) and Zinc oxide ($ZnO$), possess the unique ability to react with both acids and bases to form salt and water, distinguishing them from typical basic metal oxides.