Carbon suboxide `(C_(3)O_(2))`

Options

A. is a foul smelling gas.
B. is obtained by dehydrating malonic acid with `P_(2)O_(5)`
C. is a linear molecule.
D. all the above are correct.

Explanation

**Step-by-Step Solution for the Question on Carbon Suboxide (C₃O₂)**

1. **Understanding Carbon Suboxide (C₃O₂)**:
- Carbon suboxide is a chemical compound with the formula C₃O₂. It is known for its distinctive properties and structure.

2. **Identifying the Structure**:
- The structure of carbon suboxide can be represented as:
\[ O=C=C=C=O \]
- This shows that there are two double bonds between carbon atoms and one double bond between carbon and oxygen.

3. **Molecular Geometry**:
- The molecule is linear due to the arrangement of the carbon atoms and the double bonds. The bond lengths are approximately:
- C=C: 128 picometers
- C=O: 116 picometers

4. **Properties of Carbon Suboxide**:
- It has a "falling" smell, which is a characteristic odor associated with the compound.
- It can produce tear-stimulating gas, indicating its potential irritant properties.

5. **Synthesis of Carbon Suboxide**:
- Carbon suboxide is synthesized by dehydrating malonic acid (C₃H₄O₄) using phosphorus pentoxide (P₂O₅) as a dehydrating agent.
- The reaction can be summarized as:
\[ \text{Malonic Acid} \xrightarrow{\text{P}_2\text{O}_5, 140-150°C} \text{C}_3\text{O}_2 + \text{H}_2\text{O} \]
- In this reaction, two moles of water are released.

6. **Conclusion**:
- All the statements regarding carbon suboxide are correct:
- It has a falling smell.
- It is obtained by dehydrating malonic acid with P₂O₅.
- It is a linear molecule.

**Final Answer**: All the above statements are correct regarding carbon suboxide (C₃O₂).

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