Element essential for photolysis of water is

Options

A. Nitrogen
B. Oxygen
C. Chlorine
D. Carbon.

Answer

To solve the question regarding the element essential for the photolysis of water, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Photolysis of Water**:
- Photolysis of water refers to the process where water molecules are split into oxygen, protons, and electrons in the presence of light. This process is crucial in photosynthesis, particularly during the light-dependent reactions.

2. **Identifying the Location**:
- This reaction occurs in the thylakoid membranes of chloroplasts within plant cells. The thylakoids contain chlorophyll, which captures light energy necessary for the reaction.

3. **Recognizing the Elements Involved**:
- The photolysis of water requires certain elements or minerals to facilitate the process. The key elements involved include manganese and chlorine.

4. **Analyzing the Options**:
- The options provided are nitrogen, oxygen, chlorine, and carbon.
- Nitrogen: Not involved in photolysis.
- Oxygen: This is a product of photolysis, not a reactant.
- Chlorine: This is one of the essential elements required for the process.
- Carbon: Not involved in photolysis.

5. **Conclusion**:
- Based on the analysis, the correct answer is **chlorine**, as it is one of the elements essential for the photolysis of water.

### Final Answer:
**Chlorine** is the element essential for the photolysis of water.

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