When copper sulphate solution reacts with iron metal, copper metal is formed. This reaction comes under which of the following category?

Options

A. Decomposition reaction
B. Single displacement reaction
C. Double displacement reaction
D. Combination reaction

Explanation

To determine the category of the reaction when copper sulfate solution reacts with iron metal to form copper metal, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- The reactants in this reaction are copper sulfate (CuSO₄) and iron (Fe).
- The products formed are ferrous sulfate (FeSO₄) and copper (Cu).

2. **Write the Chemical Equation**:
- The reaction can be represented as:
\[ \text{CuSO}_4 (aq) + \text{Fe} (s) \rightarrow \text{FeSO}_4 (aq) + \text{Cu} (s) \]

3. **Analyze the Reaction Type**:
- In this reaction, iron (Fe) is more reactive than copper (Cu). Therefore, iron displaces copper from copper sulfate.
- This indicates that one element (iron) is replacing another element (copper) in a compound.

4. **Determine the Reaction Category**:
- Since one element displaces another in a compound, this type of reaction is classified as a **single displacement reaction** (also known as a single replacement reaction).

5. **Conclusion**:
- The correct category for the reaction between copper sulfate and iron is a **single displacement reaction**.