The alkaline earth metal ion present in chlorophyll is among the metal

Options

A. Ca
B. Mg
C. Be
D. Ba

Answer

To determine the alkaline earth metal ion present in chlorophyll, we can follow these steps:

### Step 1: Identify the Options
The question provides four options: calcium, magnesium, beryllium, and barium.

### Step 2: Recall the Role of Metals in Chlorophyll
Chlorophyll is the green pigment found in plants that is essential for photosynthesis. It captures light energy, which is crucial for the process of converting sunlight into chemical energy.

### Step 3: Analyze the Metals
- **Calcium (Ca)**: While important for plant structure and signaling, it is not a component of chlorophyll.
- **Magnesium (Mg)**: Known to be a central atom in the chlorophyll molecule, playing a critical role in its function.
- **Beryllium (Be)**: Not typically involved in biological processes and is toxic to plants.
- **Barium (Ba)**: Not known to be involved in chlorophyll; it is generally not a biological metal.

### Step 4: Confirm the Role of Magnesium
Magnesium is essential for the formation of chlorophyll. It helps in the absorption of light and is responsible for the green coloration of plants.

### Step 5: Conclusion
Based on the above analysis, the alkaline earth metal ion present in chlorophyll is **magnesium (Mg)**.

### Final Answer
**Magnesium (Mg)** is the alkaline earth metal ion present in chlorophyll.

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