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 compounds is a herbicide, we will analyze each option based on their properties and uses.

### Step 1: Understand what a herbicide is
A herbicide is a substance that is toxic to plants and is used to destroy unwanted vegetation, primarily weeds.

**Hint:** Remember that herbicides specifically target plants, particularly unwanted ones.

### Step 2: Analyze the first option - DDT
DDT (Dichlorodiphenyltrichloroethane) is an organochlorine compound that was primarily used as an insecticide. Although it has been banned in many places due to its environmental impact, it is not classified as a herbicide.

**Hint:** Focus on the primary use of the compound to determine if it fits the definition of a herbicide.

### Step 3: Analyze the second option - CH3Hg
CH3Hg (Dimethylmercury) is an extremely toxic organomercury compound. It is not used as a herbicide but rather is known for its toxicity and environmental hazards.

**Hint:** Consider the toxicity and application of the compound to see if it aligns with herbicide characteristics.

### Step 4: Analyze the third option - NaClO3
NaClO3 (Sodium chlorate) is an inorganic compound that is known to be an oxidizing agent. It is commonly used as a herbicide because it effectively kills unwanted plants (weeds).

**Hint:** Look for compounds that are specifically mentioned to be used for killing plants or weeds.

### Step 5: Analyze the fourth option - C2H2
C2H2 (Acetylene) is a hydrocarbon and is primarily used as a fuel gas in welding and as a chemical building block. It does not have properties that classify it as a herbicide.

**Hint:** Identify the primary uses of the compound to determine if it serves the purpose of a herbicide.

### Conclusion
After analyzing all the options, the only compound that qualifies as a herbicide is **NaClO3 (Sodium chlorate)**. Therefore, the answer is:

**Answer: NaClO3 (Sodium chlorate)**