which of the following is not true about structure of carbon dioxide?

Options

A. In `CO_(2)` carbon is sp-hybridised
B. C forms two sigma bonds one with each oxygen atom and two `p pi - p pi` bonds
C. `CO_(2)` is a liner covalent compound
D. it is a polar molecule

Answer

To determine which statement is not true about the structure of carbon dioxide (CO₂), we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Structure of CO₂**:
- Carbon dioxide is composed of one carbon atom and two oxygen atoms. The molecular formula is CO₂.
- The structure is linear, with the carbon atom in the center and the two oxygen atoms on either side.

2. **Analyzing the Statements**:
- **Statement 1**: "Carbon dioxide is a linear molecule."
- This statement is true. The molecular geometry of CO₂ is linear due to the arrangement of the atoms and the presence of double bonds between carbon and oxygen.

- **Statement 2**: "Carbon forms two sigma bonds with each oxygen atom and two pi bonds."
- This statement is also true. In CO₂, each carbon-oxygen bond consists of one sigma bond and one pi bond, making a total of two sigma and two pi bonds.

- **Statement 3**: "Carbon dioxide is a linear covalent compound."
- This statement is true as well. CO₂ is indeed a covalent compound, and its linear structure supports this classification.

- **Statement 4**: "It is a polar molecule."
- This statement is false. Although the bonds between carbon and oxygen are polar due to the difference in electronegativity, the linear shape of the molecule causes the dipoles to cancel each other out, resulting in a non-polar molecule.

3. **Conclusion**:
- The statement that is not true about the structure of carbon dioxide is **Statement 4: "It is a polar molecule."**

### Final Answer:
The incorrect statement about the structure of carbon dioxide is that it is a polar molecule.

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