Which one of the following is a herbicide?

Options

A. Organochlorines
B. Organophosphates
C. Carbamates
D. Triazine

Answer

To determine which of the following options is a herbicide, we need to analyze each option provided: organochlorines, organophosphates, carbamates, and triazines.

### Step-by-Step Solution:

1. **Understanding Herbicides**:
- A herbicide is a chemical substance used to control or kill unwanted plants (weeds) in agricultural fields.

2. **Analyzing the Options**:
- **Option 1: Organochlorines**:
- These are organic compounds that contain chlorine. They are primarily used as pesticides, not specifically as herbicides. An example is chloroform, which is not a herbicide.
- **Conclusion**: Organochlorines are not herbicides.

- **Option 2: Organophosphates**:
- This class of compounds has a general structure of O=P(OR)3. They are mainly used as insecticides and are not effective as herbicides.
- **Conclusion**: Organophosphates are not herbicides.

- **Option 3: Carbamates**:
- Carbamates are another group of compounds that function mainly as insecticides. Examples include carbamyl, methomyl, and carbofuran. They are known for their toxicity and are not used as herbicides.
- **Conclusion**: Carbamates are not herbicides.

- **Option 4: Triazines**:
- Triazines are nitrogen-containing heterocyclic compounds. They are specifically known for their use as herbicides, particularly for controlling grass and broadleaf weeds.
- **Conclusion**: Triazines are indeed herbicides.

3. **Final Answer**:
- Based on the analysis, the correct answer is **Triazines**, as they are the only compounds among the options that are classified as herbicides.