What happens when an iron nail is kept immersed in copper sulphate solution ? Write a word equation for this process. Name the type of change involved.

Explanation

### Step-by-Step Solution:

1. **Observation of the Experiment**: When an iron nail is immersed in copper sulfate solution, the blue color of the copper sulfate solution changes to light green. This indicates a chemical reaction is taking place.

2. **Identifying the Reaction**: The iron (Fe) in the nail reacts with copper sulfate (CuSO₄). In this reaction, iron displaces copper from copper sulfate because iron is more reactive than copper.

3. **Writing the Word Equation**: The word equation for this reaction can be written as:
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