What will be the order of decreasing reducing nature for the given metals ?

Options

A. `Zn gt Na gt Fe gt Mg gt Cu gt Ag`
B. `Cu gt Fe gt Mg gt Zn gt Na gt Ag`
C. `Ag gt Cu gt Fe gt Zn gt Mg gt Na`
D. `Na gt Mg gt Zn gt Fe gt Cu gt Ag`

Explanation

To determine the order of decreasing reducing nature for the given metals: Zinc (Zn), Sodium (Na), Iron (Fe), Magnesium (Mg), Copper (Cu), and Silver (Ag), we need to analyze their standard reduction potentials (E°).

### Step-by-Step Solution:

1. **Understanding Reducing Nature**:
- The reducing nature of a metal is related to its ability to lose electrons and reduce other substances. Metals with lower reduction potentials are better reducing agents because they can easily oxidize (lose electrons).

2. **Identify Standard Reduction Potentials**:
- The standard reduction potentials (E°) for the given metals are as follows:
- Sodium (Na): -2.71 V
- Magnesium (Mg): -2.36 V
- Zinc (Zn): -0.76 V
- Iron (Fe): -0.44 V
- Copper (Cu): +0.34 V
- Silver (Ag): +0.80 V

3. **Rank the Metals by Reducing Nature**:
- Metals with more negative E° values have a higher reducing nature. Therefore, we can rank the metals from the lowest (most negative) to the highest (least negative) E°:
- Sodium (Na) -2.71 V (highest reducing nature)
- Magnesium (Mg) -2.36 V
- Zinc (Zn) -0.76 V
- Iron (Fe) -0.44 V
- Copper (Cu) +0.34 V
- Silver (Ag) +0.80 V (lowest reducing nature)

4. **Final Order of Decreasing Reducing Nature**:
- Based on the above analysis, the order of decreasing reducing nature is:
- Sodium (Na) > Magnesium (Mg) > Zinc (Zn) > Iron (Fe) > Copper (Cu) > Silver (Ag)

5. **Conclusion**:
- The correct option that represents this order is Option 4: Sodium > Magnesium > Zinc > Iron > Copper > Silver.