The total amount of oxygen consumed by microorganisms in decomposing the waste present in a certain volume of sample of water is called __________ of water.

Answer

To solve the question, we need to identify the term that describes the total amount of oxygen consumed by microorganisms while decomposing organic waste in a water sample. Here’s the step-by-step solution:

### Step 1: Understand the Concept
The question is asking about the oxygen consumption by microorganisms during the decomposition of waste in water. This is a key concept in environmental chemistry, particularly in the study of water quality.

### Step 2: Identify the Relevant Term
In environmental science, there is a specific term used to quantify the amount of oxygen required by microorganisms to break down organic matter in water. This term is commonly used in water quality assessments.

### Step 3: Recall the Definition
The term that describes the total amount of oxygen consumed by microorganisms in decomposing organic waste in a water sample is known as "Biochemical Oxygen Demand" (BOD). BOD is a critical parameter used to assess the level of organic pollution in water.

### Step 4: Conclude the Answer
Thus, the answer to the question is: The total amount of oxygen consumed by microorganisms in decomposing the waste present in a certain volume of sample of water is called **Biochemical Oxygen Demand (BOD)** of water.

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