Question:
Which of the following is an amphoteric oxide?
Which of the following is an amphoteric oxide?
Show Hint
Common amphoteric oxides: $Al_{2}O_{3}$, $ZnO$, $PbO$, and $SnO$.
Updated On: May 4, 2026
- $Na_{2}O$
- $SO_{2}$
- $Al_{2}O_{3}$
- $CaO$
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Oxides are classified as acidic, basic, neutral, or amphoteric based on their reaction with acids and bases.
Step 2: Meaning
An amphoteric oxide is one that shows both acidic and basic properties, meaning it can react with both acids and strong bases to form salt and water.
Step 3: Analysis
$Na_{2}O$ and $CaO$ are basic (metallic) oxides. $SO_{2}$ is an acidic (non-metallic) oxide. $Al_{2}O_{3}$ (Alumina) reacts with $HCl$ (acting as a base) and with $NaOH$ (acting as an acid).
Step 4: Conclusion
Because Aluminum Oxide exhibits dual behavior, it is the correct amphoteric example. Final Answer: (C)
Oxides are classified as acidic, basic, neutral, or amphoteric based on their reaction with acids and bases.
Step 2: Meaning
An amphoteric oxide is one that shows both acidic and basic properties, meaning it can react with both acids and strong bases to form salt and water.
Step 3: Analysis
$Na_{2}O$ and $CaO$ are basic (metallic) oxides. $SO_{2}$ is an acidic (non-metallic) oxide. $Al_{2}O_{3}$ (Alumina) reacts with $HCl$ (acting as a base) and with $NaOH$ (acting as an acid).
Step 4: Conclusion
Because Aluminum Oxide exhibits dual behavior, it is the correct amphoteric example. Final Answer: (C)
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