`CuSO_(4)` solution + lime is called:

Options

A. Lucas reagent
B. Fenton's reagent
C. Fehling solution A`
D. Bordeaux mixture

Answer

To solve the question "CuSO₄ solution + lime is called:", we will analyze the options provided and identify the correct answer step by step.

### Step 1: Understand the Components
The question involves a solution of copper sulfate (CuSO₄) and lime. Lime typically refers to calcium hydroxide (Ca(OH)₂) or calcium oxide (CaO).

### Step 2: Analyze the Options
We have four options to consider:
1. Lucas reagent
2. Fenton's reagent
3. Felling's solution A
4. Bordeaux mixture

### Step 3: Evaluate Each Option
- **Lucas Reagent**: This is a mixture of zinc chloride (ZnCl₂) and concentrated hydrochloric acid (HCl). It is used for differentiating between alcohols, not related to CuSO₄ or lime.

- **Fenton's Reagent**: This consists of ferrous sulfate (FeSO₄) and hydrogen peroxide (H₂O₂). It is used for oxidizing contaminants in wastewater. Again, this does not involve CuSO₄ or lime.

- **Felling's Solution A**: This is primarily a solution of CuSO₄. However, it is used in conjunction with Felling's solution B to test for aldehydes and ketones. It does not refer to the combination of CuSO₄ and lime.

- **Bordeaux Mixture**: This is a mixture of CuSO₄ and lime (Ca(OH)₂). It is commonly used as a fungicide in agriculture, especially in vineyards to control fungal diseases.

### Step 4: Identify the Correct Answer
Based on the analysis, the correct answer to the question "CuSO₄ solution + lime is called:" is **Bordeaux mixture**.

### Final Answer
**Bordeaux mixture**

---