which fot the following statcment is flse about ` co_2` ?

Options

A. It has linear structure
B. It has same number of sigma and pi bonds
C. Its molcule contains two pi-electrons .
D. It turns lime water milky .

Answer

To determine which statement about CO2 (carbon dioxide) is false, we need to analyze the properties and characteristics of CO2 based on the information provided.

### Step-by-Step Solution:

1. **Identify the Structure of CO2**:
- Carbon dioxide (CO2) has a linear molecular structure. The carbon atom is double-bonded to two oxygen atoms. This gives it a linear shape with a bond angle of 180 degrees.

**Hint**: Remember that the geometry of a molecule can be determined by the arrangement of its bonds.

2. **Hybridization of Carbon in CO2**:
- The carbon atom in CO2 undergoes sp hybridization. This is because it forms two double bonds (one with each oxygen), which involves the mixing of one s orbital and one p orbital.

**Hint**: Hybridization can be determined by the number of bonds formed by the central atom.

3. **Counting Sigma and Pi Bonds**:
- In CO2, there are 2 sigma bonds (one for each C=O bond) and 2 pi bonds (one for each C=O double bond). Therefore, there are a total of 4 pi electrons (2 electrons in each pi bond).

**Hint**: Recall that each double bond consists of one sigma bond and one pi bond.

4. **Reactivity with Lime Water**:
- When CO2 is bubbled through lime water (calcium hydroxide), it reacts to form calcium carbonate, which is insoluble and causes the lime water to turn milky. This is a classic test for the presence of carbon dioxide.

**Hint**: Chemical tests can be used to identify gases based on their reactions with certain solutions.

5. **Evaluate the Statements**:
- Now we need to evaluate the statements given about CO2:
- It has a linear structure (True).
- It has the same number of sigma and pi bonds (False; it has 2 sigma bonds and 2 pi bonds).
- The molecule contains 2 pi electrons (False; it contains 4 pi electrons).
- It turns lime water to milky (True).

6. **Conclusion**:
- The false statement about CO2 is that it contains 2 pi electrons. In reality, CO2 contains 4 pi electrons.

### Final Answer:
The false statement about CO2 is that "the molecule contains 2 pi electrons."