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

Options

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

Explanation

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

### Step-by-Step Solution:

1. **Identify the Compounds**: The compounds we need to analyze are:
- Carbon Dioxide (CO2)
- Nitric Acid (HNO3)
- Sulfuric Acid (H2SO4)
- Calcium Oxide (CaO)

2. **Count the Oxygen Atoms in Each Compound**:
- **Carbon Dioxide (CO2)**:
- The formula shows there are **2 oxygen atoms**.
- **Nitric Acid (HNO3)**:
- The formula shows there are **3 oxygen atoms**.
- **Sulfuric Acid (H2SO4)**:
- The formula shows there are **4 oxygen atoms**.
- **Calcium Oxide (CaO)**:
- The formula shows there is **1 oxygen atom**.

3. **Compare the Number of Oxygen Atoms**:
- CO2: 2 oxygen atoms
- HNO3: 3 oxygen atoms
- H2SO4: 4 oxygen atoms
- CaO: 1 oxygen atom

4. **Determine the Maximum**:
- The maximum number of oxygen atoms is found in **Sulfuric Acid (H2SO4)**, which has **4 oxygen atoms**.

### Final Answer:
The molecule that possesses the maximum number of oxygen atoms is **Sulfuric Acid (H2SO4)** with **4 oxygen atoms**.

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