The amount of oxygen that would be consumed if the all organic matter in one liter of water oxidised by bacteria is called ?

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes the amount of oxygen consumed when all organic matter in one liter of water is oxidized by bacteria.

2. **Identifying Key Concepts**:
- The process involves bacteria oxidizing organic matter.
- The focus is on the oxygen consumed during this process.

3. **Defining the Term**: The specific term that describes this phenomenon is known as **Biochemical Oxygen Demand (BOD)**.

4. **Explaining BOD**:
- BOD is a measure of the amount of oxygen that bacteria will consume while decomposing organic matter in water.
- It serves as an indicator of the level of pollution in water; higher BOD values indicate more organic matter and thus more pollution.

5. **Conclusion**: Therefore, the amount of oxygen consumed when all organic matter in one liter of water is oxidized by bacteria is referred to as **Biochemical Oxygen Demand (BOD)**.

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