Copper sulphate solution can be safely kept in a container made of

Options

A. aluminium
B. lead
C. silver
D. zinc

Explanation

To determine which container is safe for storing copper sulfate solution, we need to consider the reactivity of the metals involved. Here’s a step-by-step solution:

### Step 1: Understand the Reactivity Series
The reactivity series is a list of metals arranged in order of decreasing reactivity. In this case, we need to know where copper stands in relation to the other metals mentioned: aluminum, lead, silver, and zinc.

### Step 2: Identify the Reactivity of Each Metal
- **Aluminum (Al)**: Highly reactive
- **Zinc (Zn)**: Reactive
- **Lead (Pb)**: Less reactive than zinc but more reactive than copper
- **Copper (Cu)**: Less reactive than lead
- **Silver (Ag)**: Least reactive among the metals listed

### Step 3: Determine Compatibility with Copper Sulfate
Copper sulfate (CuSO₄) can react with metals that are more reactive than copper. Therefore, we need to avoid using containers made of:
- Aluminum (reactive)
- Zinc (reactive)
- Lead (reactive)

### Step 4: Choose the Safe Option
The only metal listed that is less reactive than copper is **Silver (Ag)**. Therefore, a container made of silver can safely hold copper sulfate solution without any reaction occurring.

### Conclusion
The correct answer is **C: Silver**.

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