The oxide and hydroxide of which metal is amphoteric:

Options

A. Zine
B. Copper
C. Iron
D. Manganese

Explanation

To determine which metal has amphoteric oxide and hydroxide, we need to understand what amphoteric means. Amphoteric substances can react with both acids and bases.

### Step-by-Step Solution:

1. **Define Amphoteric Substances**: Amphoteric substances are those that can react with both acids and bases. This means they can behave as either an acid or a base depending on the reaction conditions.

**Hint**: Remember that amphoteric substances can neutralize both acids and bases.

2. **Identify Common Metals**: We need to consider common metals and their oxides and hydroxides. Some metals to consider include zinc, copper, iron, and magnesium.

**Hint**: Think about the common metals and their typical oxidation states.

3. **Evaluate Zinc**: Zinc oxide (ZnO) and zinc hydroxide (Zn(OH)₂) are known to be amphoteric. They can react with acids to form salts and with bases to form complex ions.

**Hint**: Look for examples of reactions where zinc oxide or hydroxide reacts with both an acid and a base.

4. **Evaluate Other Metals**:
- **Copper**: Copper oxide (CuO) and copper hydroxide (Cu(OH)₂) are basic and do not react with bases.
- **Iron**: Iron oxide (FeO) and iron hydroxide (Fe(OH)₂) are also basic and do not exhibit amphoteric behavior.
- **Magnesium**: Magnesium oxide (MgO) and magnesium hydroxide (Mg(OH)₂) are primarily basic and do not react with bases.

**Hint**: Compare the behavior of these metals with zinc to see if they can react with both acids and bases.

5. **Conclusion**: Based on the evaluations, zinc is the only metal among those considered whose oxide and hydroxide are amphoteric.

**Final Answer**: The oxide and hydroxide of zinc are amphoteric.