Which is/are correct statement?

Options

A. No corrosion takes place in vaccum
B. Corrosion is protected by electroplating
C. During rusting `Fe_2O_3*xH_2O` formed
D. In presence of electrolyte, corrosion takes place with greater rate

Answer

To determine which statements regarding corrosion are correct, we will analyze each statement step by step.

### Step 1: Analyze the first statement
**Statement:** No corrosion takes place in vacuum.

**Explanation:** Corrosion is a process where metals are converted into metal oxides, sulfides, or hydroxides, typically requiring the presence of oxygen (O2) or moisture. In a vacuum, the absence of O2 and moisture significantly reduces the likelihood of corrosion occurring. Therefore, this statement is **correct**.

### Step 2: Analyze the second statement
**Statement:** Corrosion is protected by electroplating.

**Explanation:** Electroplating is a method used to coat a metal with a layer of another metal. This coating can protect the underlying metal from corrosion by acting as a barrier against environmental factors. For example, iron can be coated with zinc to prevent rusting. Thus, this statement is also **correct**.

### Step 3: Analyze the third statement
**Statement:** During rusting, Fe2O3·XH2O is formed.

**Explanation:** Rusting is a specific type of corrosion that occurs with iron. During rusting, iron (Fe) reacts with oxygen and water to form iron(III) oxide (Fe2O3), which can further hydrate to form Fe2O3·XH2O, where X represents the number of water molecules. This statement is therefore **correct**.

### Step 4: Analyze the fourth statement
**Statement:** In the presence of an electrolyte, corrosion takes place at a greater rate.

**Explanation:** The presence of an electrolyte increases the concentration and mobility of electrons in the corrosion process. This enhanced mobility facilitates the oxidation and reduction reactions that are essential for corrosion, leading to an increased rate of corrosion. Hence, this statement is also **correct**.

### Conclusion
After analyzing all four statements, we find that **all statements are correct** regarding the corrosion process.

### Summary of Correct Statements:
1. No corrosion takes place in vacuum. (Correct)
2. Corrosion is protected by electroplating. (Correct)
3. During rusting, Fe2O3·XH2O is formed. (Correct)
4. In the presence of an electrolyte, corrosion takes place at a greater rate. (Correct)