If acidified solution of `K_(2)Cr_(2)O_(7) ` turm green on addition of a salt three salt may contain `Fe^(2+)`.

Explanation

To determine whether the statement "If an acidified solution of K₂Cr₂O₇ turns green on addition of a salt, the salt may contain Fe²⁺" is true or false, we can analyze the chemical reactions involved.

### Step-by-Step Solution:

1. **Understanding the Reaction**:
- Potassium dichromate (K₂Cr₂O₇) in an acidic solution contains dichromate ions (Cr₂O₇²⁻), which are orange in color.
- When Fe²⁺ ions are present in this acidic medium, they can react with the dichromate ions.

2. **Oxidation and Reduction**:
- In the reaction, Fe²⁺ is oxidized to Fe³⁺.
- At the same time, the dichromate ions (Cr₂O₇²⁻) are reduced to Cr³⁺ ions, which are green in color.

3. **Chemical Equation**:
- The balanced chemical equation for the reaction can be represented as:
\[ Cr_2O_7^{2-} + 6Fe^{2+} + 14H^+ \rightarrow 2Cr^{3+} + 6Fe^{3+} + 7H_2O \]
- Here, the dichromate ion (orange) is reduced to chromium(III) ion (green).

4. **Conclusion**:
- Since the addition of a salt containing Fe²⁺ leads to the reduction of dichromate ions and the formation of green Cr³⁺ ions, the statement is **true**.

### Final Answer:
The statement is **true**. If an acidified solution of K₂Cr₂O₇ turns green on addition of a salt, the salt may contain Fe²⁺.