Soda lime is made from:

Options

A. `Na+CaO+H_(2)O`
B. `CaO+NaOH(aq)`
C. `NaOH+CaCO_(3)`
D. `NaHCO_(3)+CaO`

Answer

To determine what soda lime is made from, we need to analyze the options provided and understand the composition of soda lime.

### Step-by-Step Solution:

1. **Understanding Soda Lime**:
- Soda lime is a chemical compound commonly used in various applications, particularly in closed breathing environments like anesthesia. It is a mixture of two main components.

2. **Identifying Components**:
- The two primary components of soda lime are Calcium Oxide (CaO) and Sodium Hydroxide (NaOH).

3. **Analyzing the Options**:
- **Option A**: Na + CaO + H2O
- This option includes sodium (Na), calcium oxide (CaO), and water (H2O). While CaO is part of soda lime, Na is not present in the form of elemental sodium in soda lime.
- **Option B**: CaO + NaOH
- This option includes calcium oxide (CaO) and sodium hydroxide (NaOH). This is consistent with the known composition of soda lime.
- **Option C**: NaOH + CaCO3
- This option includes sodium hydroxide (NaOH) and calcium carbonate (CaCO3). While NaOH is part of soda lime, CaCO3 is not.
- **Option D**: NaHCO3 + CaO
- This option includes sodium bicarbonate (NaHCO3) and calcium oxide (CaO). Sodium bicarbonate is not a component of soda lime.

4. **Conclusion**:
- Based on the analysis, the correct composition of soda lime is represented by **Option B: CaO + NaOH**.

### Final Answer:
Soda lime is made from **Calcium Oxide (CaO) and Sodium Hydroxide (NaOH)**, which corresponds to **Option B**.

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