The concentration of `ZnCl_(2)` solution will change when it is placed in a container which is made of :

Options

A. AI
B. Cu
C. Ag
D. None

Answer

To determine how the concentration of a `ZnCl2` solution will change when placed in different containers, we need to consider the reactivity of the metals that make up the containers in relation to zinc.

### Step-by-Step Solution:

1. **Identify the metals in the containers**: The question mentions four metals: Aluminium, Copper, Silver, and Nunn (assuming Nunn refers to a non-reactive metal or inert material).

2. **Refer to the reactivity series**: The reactivity series ranks metals based on their ability to displace other metals from their compounds. In this case, we need to check where zinc stands in the series relative to the metals mentioned.

3. **Analyze Aluminium**:
- Aluminium is higher in the reactivity series than zinc. This means that aluminium can displace zinc from its salt solution.
- The reaction can be represented as:
\[ 3ZnCl_2 + 2Al \rightarrow 2AlCl_3 + 3Zn \]
- Since aluminium can displace zinc, the concentration of `ZnCl2` will decrease as zinc is displaced and precipitated out.

4. **Analyze Copper**:
- Copper is lower in the reactivity series than zinc. Therefore, it cannot displace zinc from `ZnCl2`.
- The concentration of `ZnCl2` will remain unchanged if placed in a copper container.

5. **Analyze Silver**:
- Silver is also lower than zinc in the reactivity series, meaning it cannot displace zinc from `ZnCl2`.
- Thus, the concentration of `ZnCl2` will remain unchanged in a silver container as well.

6. **Analyze Nunn (assuming it is inert)**:
- If Nunn refers to an inert material, it will not react with `ZnCl2`, and the concentration will remain unchanged.

7. **Conclusion**:
- The concentration of `ZnCl2` will change when placed in a container made of Aluminium due to the displacement reaction, while it will remain unchanged in containers made of Copper, Silver, or an inert material like Nunn.

### Final Answer:
The concentration of `ZnCl2` solution will change when it is placed in a container made of **Aluminium**.