Which of the following is herbicide?

Options

A. DDT
B. `(CH_(3))_(2)Hg`
C. `NaClO_(3)`
D. `C_(2)H_(2)`

Answer

To determine which of the given options is a herbicide, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Options**: We have four options to evaluate:
- DDT (Dichloro-Diphenyl-Trichloroethane)
- Dimethyl Mercury (CH3)2Hg
- Sodium Chlorate (NaClO3)
- Acetylene (C2H2)

2. **Analyze DDT**:
- DDT is known as an insecticide, primarily used to kill insects.
- It is not classified as a herbicide because it targets insects, not plants.

3. **Analyze Dimethyl Mercury**:
- Dimethyl Mercury is primarily used in research, particularly in NMR (Nuclear Magnetic Resonance) spectroscopy.
- It does not serve as a herbicide.

4. **Analyze Sodium Chlorate (NaClO3)**:
- Sodium Chlorate is a white crystalline powder that is soluble in water.
- It is classified as a non-selective herbicide, meaning it can kill a wide range of plants and is not specific to any particular species.

5. **Analyze Acetylene (C2H2)**:
- Acetylene is a simple alkyne used mainly as a fuel for welding.
- It is not used as a herbicide.

6. **Conclusion**:
- Among the options provided, **Sodium Chlorate (NaClO3)** is the only substance that is classified as a herbicide.

### Final Answer:
**Sodium Chlorate (NaClO3) is the herbicide.**

---