The standard reduction potential values of three metallic cations, `X,Y,` and `Z` are `0.52,-3.03,` and `-0.18V`, respectively. The order of reducing power of the corresponding metal is

Options

A. `Y gt Z gt X`
B. `X gt Y gt Z`
C. `Z gt Y gt X`
D. `Z gt X gt Y`

Answer

To determine the order of reducing power of the metals corresponding to the cations X, Y, and Z based on their standard reduction potentials, we can follow these steps:

### Step 1: Understand Standard Reduction Potentials
The standard reduction potential (E°) indicates how easily a species can be reduced. A higher (more positive) reduction potential means the species is more likely to gain electrons and be reduced, while a lower (more negative) reduction potential indicates a lesser tendency to be reduced.

### Step 2: Identify the Reduction Potentials
The given standard reduction potentials are:
- For cation X: E° = +0.52 V
- For cation Y: E° = -3.03 V
- For cation Z: E° = -0.18 V

### Step 3: Calculate the Oxidation Potentials
The oxidation potential is the negative of the reduction potential. Therefore, we can calculate the oxidation potentials as follows:
- For metal X: Oxidation potential = -E° = -0.52 V
- For metal Y: Oxidation potential = -E° = +3.03 V
- For metal Z: Oxidation potential = -E° = +0.18 V

### Step 4: Determine Reducing Power
The reducing power of a metal is directly related to its oxidation potential. A higher oxidation potential indicates a stronger reducing agent. Thus, we can rank the metals based on their oxidation potentials:
- Y: +3.03 V (highest reducing power)
- Z: +0.18 V
- X: -0.52 V (lowest reducing power)

### Step 5: Write the Order of Reducing Power
Based on the oxidation potentials calculated, the order of reducing power from highest to lowest is:
1. Y (strongest reducing agent)
2. Z
3. X (weakest reducing agent)

### Final Answer
The order of reducing power of the corresponding metals is: **Y > Z > X**.

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