The arrangement of metals in a vertical column in the decreasing order of their reactivities is called the reactivity series or activity series of metals. The most reactive metal is at the top position of the reactivity series. The least reactive metal is at the bottom of the reactivity series.
Hydrogen, though a non-metal, has been included in the activity series of metals only for comparison. Apart from it, the hydrogen atom also has tendency to lose its valence electron and form cation like the behaviour shown by metals. Thus,
`H to H^(+) + e^(-)`
Which metal can be displaced by copper from in salt solution ?

Options

A. Zinc
B. Silver
C. Iron
D. Lead

Explanation

To determine which metal can be displaced by copper from its salt solution, we need to refer to the reactivity series of metals. The reactivity series ranks metals based on their ability to displace other metals from their compounds in solution.

### Step-by-Step Solution:

1. **Understand the Reactivity Series**: The reactivity series is a list of metals arranged in order of decreasing reactivity. Metals higher in the series can displace metals lower in the series from their compounds.

2. **Identify the Position of Copper**: In the reactivity series, copper is positioned below hydrogen. This means that copper is less reactive than metals above it, such as iron, zinc, and aluminum.

3. **Determine Metals that Can be Displaced by Copper**: Since copper is less reactive than metals like iron and zinc, it cannot displace these metals from their salt solutions. However, it can displace metals that are lower in the reactivity series than itself.

4. **Identify Metals Below Copper**: The metals that are less reactive than copper include silver (Ag) and gold (Au). Therefore, copper can displace these metals from their salt solutions.

5. **Conclusion**: The metal that can be displaced by copper from its salt solution is silver (Ag).

### Final Answer:
Copper can displace silver (Ag) from its salt solution.

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