If the standard reduction potential `E^(@)` for four divalent elements X,Y,Z, W are `-1.46V, -0.36V, 0.15V and -1.24V` respectively then

Options

A. X will replace `Z^(2+)` from aqueous solution
B. Y will replace `Z^(2+)` from aqueous solution
C. W will replace `Z^(2+)` from aqueous solution
D. All statements are correct

Answer

To solve the problem regarding the standard reduction potentials of the divalent elements X, Y, Z, and W, we will analyze the given potentials and determine which elements can displace others in a redox reaction based on their standard reduction potentials.

### Step-by-Step Solution:

1. **Identify the Standard Reduction Potentials**:
- For element X: \( E^0 = -1.46 \, V \)
- For element Y: \( E^0 = -0.36 \, V \)
- For element Z: \( E^0 = 0.15 \, V \)
- For element W: \( E^0 = -1.24 \, V \)

2. **Understand the Concept of Standard Reduction Potential**:
- The standard reduction potential indicates the tendency of a species to gain electrons (be reduced). A more negative value indicates a stronger reducing agent, meaning it is more likely to lose electrons and thus displace other elements from their compounds.

3. **Rank the Elements Based on Their Reduction Potentials**:
- From most negative to least negative:
- X: \( -1.46 \, V \) (most negative)
- W: \( -1.24 \, V \)
- Y: \( -0.36 \, V \)
- Z: \( 0.15 \, V \) (least negative)

4. **Determine Displacement Ability**:
- An element can displace another from a compound if it has a more negative reduction potential.
- Since Z has the highest (least negative) reduction potential, it will not displace any of the others.
- X can displace W, Y, and Z because it is the most negative.
- W can displace Y and Z but not X.
- Y can only displace Z.

5. **Conclusion**:
- Based on the ranking and displacement ability:
- X can replace Z²⁺, Y, and W.
- W can replace Y and Z.
- Y can replace Z.
- Therefore, the correct answer is that X can replace Z²⁺ from an aqueous solution, as well as Y and W can also replace Z²⁺.

### Final Answer:
The correct option is **D**, as all three elements (X, Y, and W) can displace Z²⁺ from an aqueous solution.