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When huge amount of sewage is dumped int...

When huge amount of sewage is dumped into a river, its BOD will

A

increase

B

decrease

C

sharply decrease

D

remain unchanged

Text Solution

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The correct Answer is:
To solve the question regarding the effect of dumping a huge amount of sewage into a river on its Biological Oxygen Demand (BOD), we can follow these steps: ### Step-by-Step Solution: 1. **Understanding BOD**: Biological Oxygen Demand (BOD) is a measure of the amount of oxygen that microorganisms will consume while decomposing organic matter in water. It is an important indicator of water pollution. 2. **Impact of Sewage on Water**: When a large amount of sewage is dumped into a river, it introduces a significant amount of organic matter into the water. This organic matter serves as food for bacteria and other microorganisms. 3. **Microbial Activity**: As the organic matter increases, the number of bacteria that decompose this organic matter also increases. These bacteria require oxygen to break down the organic material. 4. **Oxygen Demand Increase**: With more bacteria present and more organic matter to decompose, the demand for oxygen in the water increases. This means that the BOD will rise because more oxygen is needed for the microbial activity. 5. **Conclusion**: Therefore, when a huge amount of sewage is dumped into a river, the BOD will increase due to the higher demand for oxygen by the bacteria that are breaking down the added organic matter. ### Final Answer: When a huge amount of sewage is dumped into a river, its BOD will **increase**. ---
To solve the question regarding the effect of dumping a huge amount of sewage into a river on its Biological Oxygen Demand (BOD), we can follow these steps: ### Step-by-Step Solution: 1. **Understanding BOD**: Biological Oxygen Demand (BOD) is a measure of the amount of oxygen that microorganisms will consume while decomposing organic matter in water. It is an important indicator of water pollution. 2. **Impact of Sewage on Water**: When a large amount of sewage is dumped into a river, it introduces a significant amount of organic matter into the water. This organic matter serves as food for bacteria and other microorganisms. ...
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