Mark the incorrect statement.

Options

A. Copper is extracted by smelting in a reverberatory furnace.
B. Zinc is extracted by reduction of oxide with aluminium .
C. Aluminium is extracted by electrolysis of its oxide.
D. Iron is extracted by reduction of its oxide in blast furnace.

Explanation

To solve the question of marking the incorrect statement regarding the extraction of metals, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Option 1: Copper is extracted by smelting in the reverberatory furnace.**
- **Analysis:** This statement is correct. Copper is indeed extracted by smelting in a reverberatory furnace, where copper ores are heated to separate the metal from impurities.

2. **Option 2: Zinc is extracted by reduction of oxide with aluminium.**
- **Analysis:** This statement is incorrect. While aluminium can reduce zinc oxide, it is not a profitable method for zinc extraction. Zinc is typically extracted through distillation or electrolytic refining, rather than by reduction with aluminium.

3. **Option 3: Aluminium is extracted by electrolysis of its oxide.**
- **Analysis:** This statement is correct. Aluminium is extracted from its oxide (bauxite) through the process of electrolysis, specifically the Hall-Héroult process.

4. **Option 4: Iron is extracted by reduction of its oxide in blast furnace.**
- **Analysis:** This statement is correct. Iron is extracted from its oxide (iron ore) in a blast furnace through a reduction process using carbon.

### Conclusion:
After analyzing all the options, the incorrect statement is **Option 2: Zinc is extracted by reduction of oxide with aluminium.**

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