Which of the following statements about the given reaction is/are incorrect ?
`Fe_(2)O_(3) +2Al overset("Ignited")to 2Fe +Al_(2)O_(3)`
I. The mixture of `Fe_(2)O_(3)` and `Al` is ignited by inserting a magnesium ribbon and then burning it.
II. The reaction is used for welding the broken parts of iron machinery, railway tracks, etc.
III. The whole process is called aluminothermy.
IV. The reaction is highly endothermic.

Options

A. `I` and `III` only
B. `I` and `IV` only
C. `II` and `III` only
D. `IV` only

Explanation

To determine which statements about the reaction \( \text{Fe}_2\text{O}_3 + 2\text{Al} \overset{\text{Ignited}}{\rightarrow} 2\text{Fe} + \text{Al}_2\text{O}_3 \) are incorrect, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement I**: "The mixture of \( \text{Fe}_2\text{O}_3 \) and \( \text{Al} \) is ignited by inserting a magnesium ribbon and then burning it."
- **Analysis**: This statement is correct. In the reaction, magnesium ribbon is often used to ignite the mixture of iron(III) oxide and aluminum. The high temperature produced by burning magnesium helps initiate the reaction.

2. **Statement II**: "The reaction is used for welding the broken parts of iron machinery, railway tracks, etc."
- **Analysis**: This statement is also correct. The reaction is indeed used in thermite welding, which is a process used to weld railway tracks and other iron machinery.

3. **Statement III**: "The whole process is called aluminothermy."
- **Analysis**: This statement is correct. The process of using aluminum to reduce metal oxides, such as in this reaction, is known as aluminothermy.

4. **Statement IV**: "The reaction is highly endothermic."
- **Analysis**: This statement is incorrect. The reaction is highly exothermic, meaning it releases a significant amount of heat. In an exothermic reaction, the products have lower energy than the reactants, and heat is released during the reaction.

### Conclusion:
The incorrect statement is **Statement IV**. Thus, the answer is that the fourth statement is incorrect.