Green chemistry means such reactions which

Options

A. Study the reactions in plants
B. Produce colour during reactions
C. Reduce the use and production of hazardous chemicals
D. Are related to the depletion of ozone layer

Answer

To solve the question "Green chemistry means such reactions which," we need to analyze the provided options carefully and determine which one aligns with the principles of green chemistry.

### Step-by-Step Solution:

1. **Understanding Green Chemistry**:
- Green chemistry refers to the design of chemical products and processes that reduce or eliminate the use and generation of hazardous substances. Its main goal is to make chemical processes more sustainable and environmentally friendly.

2. **Evaluating the Options**:
- **Option A**: "Study the reaction in plants."
- This option refers to biochemistry or plant chemistry, not specifically to green chemistry. Therefore, it is incorrect.

- **Option B**: "Produces color during reaction."
- This option is not relevant to the definition of green chemistry. The production of color does not relate to the safety or environmental impact of chemical processes. So, this option is also incorrect.

- **Option C**: "Reduces the use and production of hazardous chemicals."
- This option aligns perfectly with the principles of green chemistry. The reduction of hazardous substances is a core objective of green chemistry. Hence, this option is correct.

- **Option D**: "Are related to the depletion of ozone layer."
- While minimizing hazardous chemicals can indirectly help reduce ozone depletion, this option does not define green chemistry. It is more of a consequence rather than a principle. Thus, this option is not the best choice.

3. **Conclusion**:
- After evaluating all the options, the correct answer is **Option C**: "Reduces the use and production of hazardous chemicals."

### Final Answer:
Green chemistry means such reactions which **reduce the use and production of hazardous chemicals**.

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