Which of the following is/are correct order in accordance of electropositive nature of metal ?

Options

A. `Fe lt Mg lt Cu`
B. `Na gt Mg gt Al`
C. `Mg lt Ca lt Sr`
D. `Fe gt Cu gt Zn`

Answer

To determine the correct order of electropositive nature of metals, we need to analyze the given options based on periodic trends. Electropositive nature refers to the tendency of an element to lose electrons and form positive ions. Here’s how we can approach the question step by step:

### Step 1: Understand Electropositive Nature
Electropositive nature increases down a group in the periodic table and decreases across a period from left to right. This is due to the increase in atomic size and decrease in ionization energy as you move down a group, making it easier for metals to lose electrons.

### Step 2: Analyze Each Option

**Option 1: Iron > Magnesium > Copper**
- Iron (Fe) is located to the left of magnesium (Mg) and copper (Cu) in the periodic table.
- Since electropositivity increases from right to left, iron should be more electropositive than copper, but magnesium is actually more electropositive than iron.
- **Conclusion**: This order is incorrect.

**Option 2: Sodium > Magnesium > Aluminum**
- Sodium (Na) is in Group 1, magnesium (Mg) is in Group 2, and aluminum (Al) is in Group 13.
- Sodium is more electropositive than both magnesium and aluminum, as it is further left in the periodic table.
- **Conclusion**: This order is correct.

**Option 3: Magnesium < Calcium < Strontium**
- Magnesium (Mg) is in Group 2, calcium (Ca) is below magnesium, and strontium (Sr) is below calcium in Group 2.
- As we move down the group from magnesium to strontium, the electropositive nature increases.
- **Conclusion**: This order is correct.

**Option 4: Iron > Copper > Zinc**
- Iron (Fe) is to the left of both copper (Cu) and zinc (Zn) in the periodic table.
- However, copper is more electropositive than zinc, meaning iron is more electropositive than copper, but copper is less than iron.
- **Conclusion**: This order is incorrect.

### Final Conclusion
The correct orders according to electropositive nature are:
- **Option 2**: Sodium > Magnesium > Aluminum (Correct)
- **Option 3**: Magnesium < Calcium < Strontium (Correct)

### Summary of Correct Options
- The correct orders are **Option 2** and **Option 3**.

---