Mark the example which is not correctly matched ?

Options

A. Air pollutants - Oxides of sulphur , nitrogen and carbon
B. Particulate pollutants - Dust , mist , fumes
C. Global warming - Methane, ozone, CFCs
D. Water soluable chemical pollutants - Oxides of nitrogen , carbon and sodium

Explanation

To solve the question "Mark the example which is not correctly matched?", we will analyze each option provided in the question to determine which one does not correctly represent the category it is associated with.

### Step-by-Step Solution:

1. **Understanding Air Pollutants (Option 1)**:
- Air pollutants are substances that contaminate the air and can have harmful effects on human health and the environment.
- The option states that air pollutants include oxides of sulfur, nitrogen, and carbon.
- **Analysis**:
- SOx refers to sulfur oxides (like SO2).
- NOx refers to nitrogen oxides (like NO and NO2).
- CO refers to carbon monoxide.
- This option is correctly matched.

2. **Understanding Particulate Pollutants (Option 2)**:
- Particulate pollutants are tiny particles or droplets in the air that can be inhaled and cause health issues.
- The option lists dust, mist, and fumes as examples of particulate pollutants.
- **Analysis**:
- Dust and mist are indeed particulate matter.
- Fumes can also refer to fine particles from combustion.
- This option is correctly matched.

3. **Understanding Global Warming (Option 3)**:
- Global warming is primarily caused by greenhouse gases that trap heat in the atmosphere.
- The option lists methane, ozone, and CFCs as contributors to global warming.
- **Analysis**:
- Methane (CH4) is a potent greenhouse gas.
- Ozone (O3) in the troposphere contributes to warming.
- CFCs (chlorofluorocarbons) are also known for their greenhouse effect.
- This option is correctly matched.

4. **Understanding Water Soluble Chemical Pollutants (Option 4)**:
- Water soluble chemical pollutants are substances that dissolve in water and can contaminate water sources.
- The option lists oxides of nitrogen, carbon, and sodium as water soluble pollutants.
- **Analysis**:
- Oxides of nitrogen (NOx) and carbon (CO) are not typically classified as water soluble pollutants.
- Sodium (Na) can be soluble, but it is not a pollutant in the same context as heavy metals or acids.
- This option is incorrectly matched.

### Conclusion:
The option that is not correctly matched is **Option 4**: Water soluble chemical pollutants (oxides of nitrogen, carbon, and sodium).