Blue vitriol is used as a fungicide for grape plants. True or False

Explanation

**Step-by-Step Solution:**

1. **Understanding Blue Vitriol:**
- Blue vitriol is a common name for hydrated copper sulfate, which has the chemical formula CuSO4·5H2O. This indicates that it contains copper, sulfur, and oxygen, along with water molecules.

2. **Identifying its Use:**
- Blue vitriol is known for its properties that help in controlling fungal diseases in plants. It is often used in agriculture as a fungicide.

3. **Application in Grape Plants:**
- In the context of grape plants, blue vitriol is utilized as a part of a mixture known as "Bordeaux mixture," which is a well-known fungicide used to protect grapevines from fungal infections.

4. **Conclusion:**
- Since blue vitriol is indeed used as a fungicide for grape plants, the statement "Blue vitriol is used as a fungicide for grape plants" is **True**.

**Final Answer: True**

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