A copper rod is placen in `AgNO_3` solution and `FeSO_4` solution. What changes do you obseve ? What type of reactions takes place ? Justify your observation.

Explanation

### Step-by-Step Solution

1. **Observation with AgNO3 Solution:**
- When a copper rod is placed in silver nitrate (AgNO3) solution, a chemical reaction occurs. Copper (Cu) is more reactive than silver (Ag) according to the reactivity series. Therefore, copper displaces silver from the silver nitrate solution.
- The reaction can be represented as:
\[ \text{Cu} + 2\text{AgNO}_3 \rightarrow \text{Cu(NO}_3\text{)}_2 + 2\text{Ag} \]
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