Question

Categorise the following based on their nature: \( ZnO, Na_2O, CO_2 \)

Hint:

Non-metal oxides + water \( \rightarrow \) Acid; Metal oxides + water \( \rightarrow \) Base. This simple rule helps categorize most oxides.

Answer 1

Step 1: Understanding the Concept:
The nature of an oxide is determined by the element it is bonded to. Metals typically form basic or amphoteric oxides, while non-metals form acidic or neutral oxides.
Step 2: Detailed Explanation:
1. \( ZnO \) (Zinc Oxide): As discussed in part (a), zinc is a metal that forms an Amphoteric oxide. It can react with both acids and bases.
2. \( Na_2O \) (Sodium Oxide): Sodium is a highly reactive metal. Its oxide reacts with water to form a strong base (\( NaOH \)). Therefore, it is Basic in nature.
3. \( CO_2 \) (Carbon Dioxide): Carbon is a non-metal. Its oxide reacts with water to form carbonic acid (\( H_2CO_3 \)). Therefore, it is Acidic in nature.
Step 3: Final Answer:
\( ZnO \) is Amphoteric, \( Na_2O \) is Basic, and \( CO_2 \) is Acidic.