If plants stop photosynthesis which gas will disappear

Options

A. `CO_(2)`
B. `N_(2)`
C. `O_(2)`
D. `NH_(3)`

Answer

**Step-by-Step Solution:**

1. **Understanding Photosynthesis**:
- Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy. In this process, carbon dioxide (CO2) and water (H2O) are used to produce glucose (C6H12O6) and oxygen (O2).
- The overall equation for photosynthesis can be summarized as:
\[ 6CO_2 + 6H_2O \xrightarrow{\text{light energy}} C_6H_{12}O_6 + 6O_2 \]

2. **Identifying the Role of Oxygen**:
- During photosynthesis, oxygen is released as a byproduct. This means that when photosynthesis occurs, oxygen is produced and enters the atmosphere.

3. **Analyzing the Question**:
- The question asks what will happen if plants stop photosynthesis. If photosynthesis ceases, the production of glucose and oxygen will also stop.

4. **Determining the Gas that Will Disappear**:
- If plants are not performing photosynthesis, they will not release oxygen into the atmosphere. Therefore, the concentration of oxygen in the environment will decrease over time.
- Other gases mentioned (CO2, N2, NH3) will not disappear in the same manner because CO2 is still available in the atmosphere, and nitrogen (N2) and ammonia (NH3) are not directly affected by the photosynthesis process.

5. **Conclusion**:
- The gas that will disappear if plants stop photosynthesis is oxygen (O2).

**Final Answer**: Oxygen (O2) will disappear if plants stop photosynthesis.

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