White vitriol is

Options

A. ZnS
B. `ZnSO_(4)`
C. `ZnSO_(4)*7H_(2)O`
D. `ZnCO_(3)`

Answer

To solve the question "White vitriol is", we need to identify the correct chemical compound associated with the term "white vitriol". Let's go through the steps:

### Step-by-Step Solution:

1. **Understanding the Term "White Vitriol":**
- White vitriol is a common name for a specific chemical compound. It is important to identify what this compound is.

2. **Identifying the Chemical Compounds Listed:**
- The options provided are:
- A) ZnS (Zinc Sulfide)
- B) ZnSO4 (Zinc Sulfate)
- C) ZnSO4·7H2O (Zinc Sulfate Heptahydrate)
- D) ZnCO3 (Zinc Carbonate)

3. **Recognizing the Common Name:**
- The term "white vitriol" typically refers to a hydrated form of zinc sulfate.

4. **Determining the Correct Formula:**
- The hydrated form of zinc sulfate is ZnSO4·7H2O, which indicates that it contains seven molecules of water.

5. **Conclusion:**
- Therefore, the correct answer to the question "White vitriol is" is **ZnSO4·7H2O** (option C).

### Final Answer:
White vitriol is **ZnSO4·7H2O**.

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