Which of the following is not correct?

Options

A. `2O_(2)overset("Silent electric")underset("discharge")hArr2O_(3),DeltaH=-"284.5KJ"`
B. Ozone undergoes addition reaction with unsaturated carbon compounds.
C. Nitrogen oxides emitted from jet planes might be slowly depleting ozone.
D. Ozone oxides lead sulphide to lead sulphate

Answer

To determine which statement is not correct regarding the properties and reactions of ozone and oxygen, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Analyze Option 1**:
- Statement: "Oxygen molecule is getting converted to ozone by silent electrical discharge and delta H is given to be negative."
- Explanation: The conversion of O2 to O3 (ozone) through silent electrical discharge is an endothermic process, meaning it absorbs energy. Therefore, the enthalpy change (ΔH) should be positive, not negative. This statement is incorrect.

2. **Analyze Option 2**:
- Statement: "Ozone undergoes addition reaction with unsaturated carbon compounds."
- Explanation: This statement is correct. Ozone can react with unsaturated compounds through a reaction known as ozone lysis, leading to the formation of aldehydes, ketones, and carboxylic acids.

3. **Analyze Option 3**:
- Statement: "Nitrogen oxide emitted from jet planes might be slowly depleting ozone."
- Explanation: This statement is also correct. Nitrogen oxides (NO and NO2) can react with ozone, leading to the depletion of the ozone layer.

4. **Analyze Option 4**:
- Statement: "Ozone oxidizes lead sulphide to lead sulphate."
- Explanation: This statement is correct. Ozone acts as a strong oxidizing agent and can oxidize lead sulfide (PbS) to lead sulfate (PbSO4).

### Conclusion:
- The only incorrect statement among the options is Option 1. Therefore, the answer to the question "Which of the following is not correct?" is Option 1.