Which among the following molecules possesses the maximum number of oxygen atoms?

Options

A. Carbon dioxide
B. Nitric acid
C. Sulphuric acid
D. Calcium oxide

Answer

To determine which molecule possesses the maximum number of oxygen atoms among the given options, we will analyze each molecule one by one.

### Step-by-Step Solution:

1. **Identify the molecules and their formulas:**
- Carbon Dioxide (CO₂)
- Nitric Acid (HNO₃)
- Sulfuric Acid (H₂SO₄)
- Calcium Oxide (CaO)

2. **Count the number of oxygen atoms in each molecule:**
- **Carbon Dioxide (CO₂)**:
- The formula indicates there are **2 oxygen atoms**.
- **Nitric Acid (HNO₃)**:
- The formula indicates there are **3 oxygen atoms**.
- **Sulfuric Acid (H₂SO₄)**:
- The formula indicates there are **4 oxygen atoms**.
- **Calcium Oxide (CaO)**:
- The formula indicates there is **1 oxygen atom**.

3. **Compare the number of oxygen atoms:**
- Carbon Dioxide: 2 oxygen atoms
- Nitric Acid: 3 oxygen atoms
- Sulfuric Acid: 4 oxygen atoms
- Calcium Oxide: 1 oxygen atom

4. **Determine which molecule has the maximum number of oxygen atoms:**
- Among the counted oxygen atoms, **Sulfuric Acid (H₂SO₄)** has the highest number, which is **4 oxygen atoms**.

5. **Conclusion:**
- Therefore, the molecule that possesses the maximum number of oxygen atoms is **Sulfuric Acid (H₂SO₄)**.

### Final Answer:
Sulfuric Acid (H₂SO₄) possesses the maximum number of oxygen atoms.

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