When `Cl_2` reacts with Fe (or) Cu it does not form

Options

A. `FeCl_2`
B. `CuCl`
C. `FeCl_3` and `CuCl_2`
D. `FeCl_2` and `CuCl`

Answer

To solve the question "When Cl₂ reacts with Fe (or) Cu it does not form," we need to analyze the reactions of chlorine with iron (Fe) and copper (Cu) and determine which compounds are stable and which are not.

### Step-by-Step Solution:

1. **Understanding Chlorine's Reactivity**: Chlorine (Cl₂) is a strong oxidizing agent and tends to react with metals to form metal chlorides.

2. **Reaction of Chlorine with Iron (Fe)**:
- When chlorine reacts with iron, it can form iron(III) chloride (FeCl₃).
- The reaction can be represented as:
\[ 2Fe + 3Cl_2 \rightarrow 2FeCl_3 \]
- Iron(II) chloride (FeCl₂) is not stable under normal conditions, hence it is not formed.

3. **Reaction of Chlorine with Copper (Cu)**:
- When chlorine reacts with copper, it forms copper(II) chloride (CuCl₂).
- The reaction can be represented as:
\[ Cu + Cl_2 \rightarrow CuCl_2 \]
- Copper(I) chloride (CuCl) is less stable compared to CuCl₂ and is not typically formed in this reaction.

4. **Conclusion**: Based on the stability of the compounds formed:
- FeCl₂ is not formed because it is unstable.
- CuCl is also not formed because it is less stable compared to CuCl₂.

### Final Answer:
When Cl₂ reacts with Fe (or) Cu, it does not form **FeCl₂ and CuCl**.