Which of the following oxides is amphoteric? (2019)

Which of the following oxides is amphoteric? (2019)

Step 1: Understand what an oxide is. An oxide is a chemical compound that contains at least one oxygen atom and one other element.
Step 2: Learn about amphoteric oxides. Amphoteric oxides can react with both acids and bases.
Step 3: Identify the oxides given in the question. Look for examples of oxides that might be amphoteric.
Step 4: Check if Al2O3 (aluminum oxide) can react with acids. It can react with hydrochloric acid (HCl) to form aluminum chloride and water.
Step 5: Check if Al2O3 can react with bases. It can react with sodium hydroxide (NaOH) to form sodium aluminate and water.
Step 6: Conclude that since Al2O3 reacts with both acids and bases, it is an amphoteric oxide.

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