Which of these metals can displace magnesium from magnesium sulphate solution?

Options

A. Aluminium
B. Calcium
C. Copper
D. Iron

Answer

To determine which of the given metals can displace magnesium from magnesium sulfate solution, we will follow these steps:

### Step 1: Understand the Reactivity Series
The reactivity series is a list of metals arranged in order of decreasing reactivity. A more reactive metal can displace a less reactive metal from its compound in solution.

### Step 2: Identify the Metals Given
The metals provided in the question are:
- Aluminium
- Calcium
- Copper
- Iron

### Step 3: Arrange the Metals in the Reactivity Series
We need to arrange these metals in the order of their reactivity:
1. Calcium (most reactive)
2. Aluminium
3. Iron
4. Copper (least reactive)

### Step 4: Compare with Magnesium
Next, we need to place magnesium in the reactivity series for comparison. Magnesium is more reactive than aluminium and iron but less reactive than calcium. Therefore, the order including magnesium is:
1. Calcium
2. Magnesium
3. Aluminium
4. Iron
5. Copper

### Step 5: Determine Displacement Ability
A metal can displace another metal from its salt solution if it is higher in the reactivity series. Since calcium is above magnesium in the reactivity series, it can displace magnesium from magnesium sulfate solution.

### Conclusion
Thus, the metal that can displace magnesium from magnesium sulfate solution is **Calcium**.

### Final Answer
The correct option is **Calcium** (Option 2).

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