Measurement of dissolved oxygen that would be needed by the microorganism to oxidise the compounds is known as

Options

A. Acid rain
B. BOD
C. COD
D. Ozone layer depletion

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks for the term that describes the measurement of dissolved oxygen required by microorganisms to oxidize compounds.

2. **Analyzing the Options:**
- **Option A: Acid Rain** - This refers to rain that has been made acidic by pollutants. It does not relate to the measurement of oxygen needed by microorganisms.
- **Option B: Biological Oxygen Demand (BOD)** - This is the amount of dissolved oxygen required by microorganisms to decompose organic matter in water. This directly relates to the question.
- **Option C: Chemical Oxygen Demand (COD)** - This measures the total oxygen required to chemically oxidize organic and inorganic matter in water. While related to oxygen demand, it does not specifically focus on microorganisms.

3. **Identifying the Correct Answer:**
Since BOD specifically measures the dissolved oxygen needed by microorganisms to oxidize organic compounds, it is the correct answer.

4. **Conclusion:**
The measurement of dissolved oxygen that would be needed by microorganisms to oxidize the compounds is known as **Biological Oxygen Demand (BOD)**.

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