A test procedure based on the chemical decomposition of organic and inorganic chemicals suspended in water is

Options

A. BOD
B. CFC
C. COD
D. APC

Answer

To solve the question regarding the test procedure based on the chemical decomposition of organic and inorganic chemicals suspended in water, we can analyze the given options step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a test procedure that involves the chemical decomposition of organic and inorganic chemicals suspended in water. This indicates that we are looking for a method that measures the amount of oxygen required to decompose these substances.

2. **Evaluating the Options**:
- **Option A: VOD (Biochemical Oxygen Demand)**: This measures the amount of oxygen consumed by microorganisms to decompose organic matter in water. While relevant, it specifically focuses on biological processes rather than chemical decomposition.

- **Option B: PSP (Polychlorinated Biphenyls)**: This refers to a group of man-made organic chemicals and does not relate to a test procedure for measuring decomposition in water.

- **Option C: COD (Chemical Oxygen Demand)**: This is a procedure that measures the total oxygen required to chemically oxidize organic and inorganic substances in water. This directly relates to the question as it involves the chemical decomposition of suspended substances.

- **Option D: ABC (Air Pollution Control)**: This term relates to measures taken to control air pollution and does not pertain to water analysis or decomposition.

3. **Conclusion**: After evaluating the options, the correct answer is **COD (Chemical Oxygen Demand)**, as it specifically measures the chemical decomposition of organic and inorganic chemicals suspended in water.

### Final Answer:
The test procedure based on the chemical decomposition of organic and inorganic chemicals suspended in water is **COD (Chemical Oxygen Demand)**.

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