Mortar is mixture is ,

Options

A. `Ca(OH)_(2)`, silica and water
B. `CaCO_(3) and SiO_(2)`
C. `CaO` and silica
D. `CaCO_(3), SiO_(3)` and water

Answer

To solve the question about what mortar is a mixture of, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Identify the Components of Mortar**:
Mortar is primarily used in construction to bind materials together. The main components of mortar include slaked lime (calcium hydroxide), sand, and water.

2. **Understand the Role of Each Component**:
- **Calcium Hydroxide (Slaked Lime)**: This is the primary binding agent in mortar. It reacts with carbon dioxide in the air to form calcium carbonate, which helps in hardening the mortar.
- **Sand**: The major component of sand is silica (silicon dioxide). Sand provides bulk and strength to the mortar.
- **Water**: Water is essential for the chemical reactions to occur and helps in mixing the components to form a paste.

3. **Analyze the Given Options**:
- **Option A**: Calcium hydroxide, silica, and water. This matches the identified components of mortar.
- **Option B**: Calcium Carbonate and Silicon Dioxide. This is not correct as it does not represent the mixture used in mortar.
- **Option C**: Calcium Oxide and Silica. This is also incorrect because calcium oxide is not a direct component of mortar.
- **Option D**: Calcium Carbonate, SiO3, and water. This is incorrect as well since it does not accurately describe the components of mortar.

4. **Conclusion**:
Based on the analysis, the correct answer is **Option A**: Calcium hydroxide, silica, and water.

### Final Answer:
Mortar is a mixture of calcium hydroxide, silica, and water. Therefore, the correct option is **A**.

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