Which of the following statements regarding rusting of iron is `//` are correct ?

Options

A. It takes place is moist air.
B. It is stopped in `CO_(2)` atmosphere
C. If produces `Fe(III)` oxide.
D. It is an electrochemical process.

Explanation

To determine which statements regarding the rusting of iron are correct, let's analyze each statement one by one based on the information provided.

### Step-by-Step Solution

1. **Understanding Rusting of Iron**:
- Rusting is the process in which iron reacts with oxygen and moisture in the air to form iron oxide, commonly known as rust. The appearance of rust is a reddish-brown layer on the surface of iron.

2. **Analyzing the Statements**:
- **Statement 1**: "It takes place in the moist air."
- **Analysis**: This statement is **correct**. Rusting occurs in the presence of moisture (water vapor) in the air. Without moisture, rusting does not take place.

- **Statement 2**: "It is stopped in the CO2 atmosphere."
- **Analysis**: This statement is **incorrect**. The presence of CO2 actually aids in the rusting process. CO2 can dissolve in water to form carbonic acid, which can further react with iron, promoting rust formation.

- **Statement 3**: "It produces Fe3O2."
- **Analysis**: This statement is **incorrect**. The primary product of rusting is Fe2O3 (iron(III) oxide), not Fe3O2. The correct formula for rust is often represented as Fe2O3·nH2O, indicating it contains water molecules.

- **Statement 4**: "It is an electrochemical process."
- **Analysis**: This statement is **correct**. Rusting is indeed an electrochemical process where iron acts as the anode (oxidation occurs) and the atmospheric gases act as the cathode (reduction occurs).

3. **Conclusion**:
- The correct statements regarding the rusting of iron are:
- Statement 1: Correct
- Statement 2: Incorrect
- Statement 3: Incorrect
- Statement 4: Correct

### Final Answer:
The correct statements regarding the rusting of iron are:
- It takes place in the moist air.
- It is an electrochemical process.