Which one of the following will be displaced from its salt solution by copper?

Options

A. `Fe^(2+)`
B. `Ag^+`
C. `Zn^(2+)`
D. `Al^(2+)`

Explanation

To solve the question "Which one of the following will be displaced from its salt solution by copper?", we need to follow these steps:

### Step 1: Understand the Concept of Displacement Reactions
In a displacement reaction, a more reactive metal can displace a less reactive metal from its salt solution. This means that for copper to displace another metal (let's call it M) from its salt solution, metal M must be less reactive than copper.

### Step 2: Refer to the Reactivity Series
The reactivity series is a list of metals arranged in order of decreasing reactivity. Metals higher in the series can displace those lower in the series from their compounds.

### Step 3: Locate Copper in the Reactivity Series
From the reactivity series, we can see that copper is positioned below metals like iron, aluminum, and zinc, but above metals like silver (Ag) and gold (Au).

### Step 4: Analyze the Options
We need to check the position of each metal in the options against copper:
- **Iron (Fe)**: Above copper in the reactivity series - **cannot be displaced**.
- **Aluminum (Al)**: Above copper in the reactivity series - **cannot be displaced**.
- **Zinc (Zn)**: Above copper in the reactivity series - **cannot be displaced**.
- **Silver (Ag)**: Below copper in the reactivity series - **can be displaced**.

### Step 5: Conclusion
Since copper can only displace metals that are below it in the reactivity series, the only metal that can be displaced from its salt solution by copper is silver (Ag).

### Final Answer
**Silver (Ag)** will be displaced from its salt solution by copper.

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