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The prime contaminants in lakes eutrophi...

The prime contaminants in lakes eutrophied by sewage and agriculture wastes are:

A

Sulphates and phosphates

B

Nitrates and sulphates

C

Nitrates and phosphates

D

Nitrates and carbonates.

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The correct Answer is:
To solve the question regarding the prime contaminants in lakes eutrophied by sewage and agricultural wastes, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Eutrophication**: Eutrophication is a process where water bodies, such as lakes, become overly enriched with nutrients, leading to excessive growth of algae (algal blooms). This process can be triggered by runoff from agricultural fields and sewage. 2. **Identifying Nutrients**: The main nutrients that contribute to eutrophication are nitrogen and phosphorus. These nutrients often come from fertilizers used in agriculture and from sewage. 3. **Forms of Nutrients**: In agricultural practices, nitrogen is commonly found in the form of nitrates (NO3-) and phosphorus is found in the form of phosphates (PO4^3-). 4. **Analyzing the Options**: The question provides several options: - Sulphates and phosphates - Nitrates and sulphates - Nitrates and phosphates - Nitrates and carbonates 5. **Selecting the Correct Answer**: Since we know that nitrates (from nitrogen) and phosphates (from phosphorus) are the primary contributors to eutrophication, the correct answer is **nitrates and phosphates**. ### Final Answer: The prime contaminants in lakes eutrophied by sewage and agricultural wastes are **nitrates and phosphates**. ---
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