Select the incorret match

Options

A. Biodegradable pollutant : Domestic sewage
B. Non-degrdable pollutant : DDT
C. Secondary pollutant : `SO_(2)`
D. Quantitative pollutant : Nitrogen oxides

Answer

To solve the question "Select the incorrect match," we will analyze each option provided in the video transcript step by step.

### Step 1: Understand Biodegradable Pollutants
- **Definition**: Biodegradable pollutants are substances that can be broken down by natural processes, typically by microorganisms, into harmless or less harmful products.
- **Example**: Domestic sewage is a biodegradable pollutant because it can decompose quickly through natural processes.

### Step 2: Understand Non-degradable Pollutants
- **Definition**: Non-degradable pollutants are substances that do not decompose or take a very long time to break down in the environment.
- **Example**: DDT (Dichloro-Diphenyl-Trichloroethane) is a non-degradable pollutant, as it remains in the environment for a long time without breaking down.

### Step 3: Understand Primary and Secondary Pollutants
- **Primary Pollutants**: These are pollutants that are emitted directly into the atmosphere.
- **Example**: SO2 (sulfur dioxide) is a primary pollutant as it is released directly from sources like burning fossil fuels.
- **Secondary Pollutants**: These are formed when primary pollutants react with each other or with other substances in the atmosphere.

### Step 4: Understand Quantitative Pollutants
- **Definition**: Quantitative pollutants refer to substances that are naturally present in the environment but become pollutants when their concentration increases.
- **Example**: Nitrogen Oxides can be considered quantitative pollutants when their levels rise due to human activities.

### Step 5: Identify the Incorrect Match
- From the analysis:
- Domestic sewage is correctly matched as a biodegradable pollutant.
- DDT is correctly matched as a non-degradable pollutant.
- SO2 is incorrectly matched as a secondary pollutant; it is actually a primary pollutant.
- Nitrogen Oxide is correctly matched as a quantitative pollutant.

### Conclusion
The incorrect match is **SO2 as a secondary pollutant**.

### Final Answer
The incorrect match is option 3: **SO2 (which is a primary pollutant) labeled as a secondary pollutant.**

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