Limestone is used in the manufacture of

Options

A. quick lime
B. glass
C. cement
D. all of these

Explanation

**Step-by-Step Solution:**

1. **Identify the Composition of Limestone:**
- Limestone is primarily composed of calcium carbonate (CaCO3).

2. **Understand the Uses of Limestone:**
- Limestone is a versatile material used in various industries. It serves as a raw material in the production of several products.

3. **Determine the Products Made from Limestone:**
- **Quicklime:** When limestone is heated, it decomposes to form quicklime (calcium oxide, CaO).
- **Glass:** Limestone is also used in the manufacture of glass, where it acts as a stabilizer.
- **Cement:** Limestone is a key ingredient in the production of cement, which is made by heating limestone with clay and other materials.

4. **Evaluate the Options:**
- The question provides options: quicklime, glass, cement, and all of these. Since limestone is used to manufacture all three products, the correct answer is "all of these."

5. **Conclusion:**
- Therefore, limestone is used in the manufacture of quicklime, glass, and cement.

**Final Answer:**
Limestone is used in the manufacture of quicklime, glass, and cement (all of these).

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