The value of BOD of highly polluted water is

Options

A. more than 17 ppm
B. more than 5 ppm
C. 1 ppm
D. 5 ppm

Answer

To determine the value of the Biochemical Oxygen Demand (BOD) of highly polluted water, we can follow these steps:

### Step 1: Understand BOD
BOD stands for Biochemical Oxygen Demand, which measures the amount of oxygen that microorganisms will consume while decomposing organic matter in water. It is an important indicator of water quality.

**Hint:** Remember that BOD reflects the level of organic pollution in water.

### Step 2: Recognize the BOD Thresholds
BOD values can be categorized based on their levels:
- BOD less than 5 ppm: Good water quality
- BOD between 5 ppm and 17 ppm: Moderately polluted water
- BOD greater than 17 ppm: Highly polluted water

**Hint:** Familiarize yourself with the specific BOD ranges to classify water quality.

### Step 3: Identify the BOD Value for Highly Polluted Water
According to the information provided, if the BOD value is greater than 17 ppm, it indicates that the water is highly polluted.

**Hint:** Focus on the threshold value of 17 ppm as the cutoff for high pollution.

### Step 4: Conclude the BOD Value
Therefore, the value of BOD for highly polluted water is greater than 17 ppm. However, for the purpose of this question, we can state that the BOD value is typically considered to be 17 ppm or more.

**Hint:** Remember that the specific value mentioned (17 ppm) is the minimum threshold for classifying water as highly polluted.

### Final Answer
The value of BOD of highly polluted water is greater than 17 ppm, with 17 ppm being the minimum threshold for classification.