Which of the following is the wrong statement?

Options

A. Ozone is paramagnetic gas.
B. The two oxygen -oxygen bond length in ozone are identical.
C. `O_(3)` molecule is bent.
D. Ozone is violet-black in solid state.

Explanation

To determine which statement about the ozone molecule (O3) is incorrect, let's analyze the provided statements step by step.

### Step 1: Identify the nature of ozone
Ozone (O3) is a molecule consisting of three oxygen atoms. It is important to know whether it is paramagnetic or diamagnetic.

**Hint:** Recall the definitions of paramagnetic and diamagnetic substances. Paramagnetic substances have unpaired electrons, while diamagnetic substances have all electrons paired.

### Step 2: Analyze the first statement
The first statement claims that "ozone is a paramagnetic gas."

- Ozone has a resonance structure, and when we analyze its electronic configuration, we find that all the electrons are paired. Therefore, ozone is actually diamagnetic, not paramagnetic.

**Conclusion:** This statement is incorrect.

**Hint:** Check the electron configuration of ozone to confirm its magnetic properties.

### Step 3: Analyze the second statement
The second statement says, "the two oxygen-oxygen bond lengths in ozone are identical."

- In ozone, there are two types of O-O bonds due to resonance, but they are averaged out, resulting in identical bond lengths.

**Conclusion:** This statement is correct.

**Hint:** Consider the concept of resonance and its effect on bond lengths in molecules.

### Step 4: Analyze the third statement
The third statement claims, "O3 molecule is bent."

- The molecular geometry of ozone is indeed bent due to the presence of lone pairs on the central oxygen atom, which causes repulsion and results in a bent shape.

**Conclusion:** This statement is also correct.

**Hint:** Visualize the molecular geometry of ozone to understand its shape.

### Step 5: Analyze the fourth statement
The fourth statement states, "in the solid state, the color of ozone molecule O3 is violet-black."

- Ozone in its solid state does exhibit a violet-black color, which is a characteristic property of solid ozone.

**Conclusion:** This statement is correct.

**Hint:** Research the physical properties of ozone in different states to verify this claim.

### Final Conclusion
After analyzing all the statements:
- The first statement about ozone being paramagnetic is incorrect. Therefore, the wrong statement is the first one.

### Summary
The wrong statement is: **"ozone is a paramagnetic gas."**