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Assertion (A): Activated sludge should h...

Assertion (A): Activated sludge should have the ability to settle quickly. Reason (R): To absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank.

A

Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B

Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C

Assertion (A) is true but reason (R) is false.

D

Assertion (A) is false but reason (R) is true.

Text Solution

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The correct Answer is:
To analyze the given assertion and reason, we can break down the solution into the following steps: ### Step 1: Understand the Assertion The assertion states that "Activated sludge should have the ability to settle quickly." This is indeed true because quick settling of activated sludge is essential in wastewater treatment processes. It allows for efficient separation of solids from liquids, which is crucial for the treatment process. ### Step 2: Understand the Reason The reason provided is "To absorb pathogenic bacteria present in wastewater while sinking to the bottom of the settling tank." This statement is misleading. While activated sludge does play a role in treating wastewater, its primary function is not to absorb pathogenic bacteria while sinking. Instead, the quick settling is necessary for efficient separation and recycling of the sludge back into the aeration tank. ### Step 3: Evaluate the Relationship Between Assertion and Reason Now we need to evaluate the relationship between the assertion and the reason. The assertion is true, but the reason does not correctly explain why activated sludge needs to settle quickly. The reason is incorrect in its explanation of the assertion. ### Step 4: Conclusion Based on the evaluation, we conclude that: - The assertion is true. - The reason is false. Thus, the correct option is that the assertion is true, but the reason is false. ### Final Answer The correct option is: **C) The assertion is true but the reason is false.** ---
To analyze the given assertion and reason, we can break down the solution into the following steps: ### Step 1: Understand the Assertion The assertion states that "Activated sludge should have the ability to settle quickly." This is indeed true because quick settling of activated sludge is essential in wastewater treatment processes. It allows for efficient separation of solids from liquids, which is crucial for the treatment process. ### Step 2: Understand the Reason The reason provided is "To absorb pathogenic bacteria present in wastewater while sinking to the bottom of the settling tank." This statement is misleading. While activated sludge does play a role in treating wastewater, its primary function is not to absorb pathogenic bacteria while sinking. Instead, the quick settling is necessary for efficient separation and recycling of the sludge back into the aeration tank. ...
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