Which of the following state of carbon dioxide will have lowest density ?

Options

A. solid
B. Liquid
C. gas
D. None

Explanation

To determine which state of carbon dioxide (CO₂) has the lowest density, we will analyze the three states of matter: solid, liquid, and gas.

### Step-by-Step Solution:

1. **Understanding States of Carbon Dioxide**:
- Carbon dioxide can exist in three states: solid (dry ice), liquid, and gas.
- Each state has different properties, including density.

2. **Density Concept**:
- Density is defined as mass per unit volume:
\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \]
- The relationship indicates that if the volume increases while the mass remains constant, the density decreases.

3. **Comparing Densities of Different States**:
- **Solid State (Dry Ice)**: In the solid state, CO₂ molecules are closely packed together, resulting in a higher density.
- **Liquid State**: In the liquid state, CO₂ molecules are still relatively close but not as tightly packed as in the solid state, leading to a lower density than solid but higher than gas.
- **Gaseous State**: In the gaseous state, CO₂ molecules are far apart due to weak intermolecular forces. This results in a significantly larger volume compared to the solid and liquid states.

4. **Conclusion**:
- Since the gaseous state has the molecules farthest apart, it occupies the largest volume, leading to the lowest density among the three states.
- Therefore, the state of carbon dioxide with the lowest density is the **gaseous state**.

### Final Answer:
The gaseous state of carbon dioxide has the lowest density.

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