Which of the following can decompose on heating to give `CO_(2)` ?

Options

A. `Li_(2)CO_(3)`
B. `Na_(2)CO_(3)`
C. `KHCO_(3)`
D. `BaCO_(3)`

Answer

To determine which of the given compounds can decompose on heating to produce carbon dioxide (CO₂), we will analyze each option step by step.

### Step 1: Analyze Lithium Carbonate
- **Heating Reaction**: When lithium carbonate (Li₂CO₃) is heated, it decomposes.
- **Products**: The reaction produces lithium oxide (Li₂O) and carbon dioxide (CO₂).
- **Conclusion**: Lithium carbonate decomposes to give CO₂.

### Step 2: Analyze Sodium Carbonate
- **Heating Reaction**: Sodium carbonate (Na₂CO₃) when heated at around 500°C also decomposes.
- **Products**: It produces sodium oxide (Na₂O) and carbon dioxide (CO₂).
- **Conclusion**: Sodium carbonate decomposes to give CO₂.

### Step 3: Analyze Potassium Hydrogen Carbonate
- **Heating Reaction**: Potassium hydrogen carbonate (KHCO₃) decomposes upon heating.
- **Products**: The decomposition yields potassium carbonate (K₂CO₃), carbon dioxide (CO₂), and water (H₂O).
- **Conclusion**: Potassium hydrogen carbonate decomposes to give CO₂.

### Step 4: Analyze Barium Carbonate
- **Heating Reaction**: Barium carbonate (BaCO₃) when heated decomposes.
- **Products**: It produces barium oxide (BaO) and carbon dioxide (CO₂).
- **Conclusion**: Barium carbonate decomposes to give CO₂.

### Final Conclusion
After analyzing all the options:
- **Lithium Carbonate**: Decomposes to give CO₂.
- **Sodium Carbonate**: Decomposes to give CO₂.
- **Potassium Hydrogen Carbonate**: Decomposes to give CO₂.
- **Barium Carbonate**: Decomposes to give CO₂.

Thus, all of the given compounds (Lithium Carbonate, Sodium Carbonate, Potassium Hydrogen Carbonate, and Barium Carbonate) can decompose on heating to give carbon dioxide.

### Answer
All of the above (Lithium Carbonate, Sodium Carbonate, Potassium Hydrogen Carbonate, and Barium Carbonate) can decompose on heating to give CO₂.

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