Organo mercury compounds are

Options

A. Herbicides
B. Fungicides
C. Soil conditioners
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding Organomercury Compounds:**
- Organomercury compounds are a group of organometallic compounds that contain mercury (Hg) bonded to carbon (C) through covalent bonds.

2. **Identifying Uses of Organomercury Compounds:**
- These compounds have various applications, particularly in agriculture and environmental management. They are known to be used as:
- **Herbicides:** Chemicals used to kill unwanted plants or weeds.
- **Fungicides:** Chemicals that kill or inhibit the growth of fungi, protecting crops from fungal diseases.
- **Soil Conditioners:** Substances that improve the physical properties of soil, enhancing its fertility and structure.

3. **Specific Example:**
- An example of an organomercury compound is methyl mercury chloride, which is specifically used as a fungicide. This highlights their role in plant protection, especially for seeds.

4. **Conclusion:**
- Given that organomercury compounds serve as herbicides, fungicides, and soil conditioners, we conclude that they are utilized in all these capacities.

5. **Final Answer:**
- Therefore, the correct answer to the question is "all of these."

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