Which of these can be used as moth repellant

Options

A. Benzene hexachloride
B. Benzal chloride
C. Hexachloroethane
D. Tetrachloroethane

Answer

To determine which compound can be used as a moth repellent, we need to analyze the options given in the question. While the video transcript primarily discusses hexachloroethane and its uses, it does not explicitly list the compounds being compared for their moth-repelling properties.

However, we can deduce the following steps based on the information provided:

### Step 1: Identify the Compounds
First, we need to identify the compounds that are being considered for use as moth repellents. Common moth repellents include natural substances like cedarwood oil, lavender oil, and synthetic compounds like naphthalene and paradichlorobenzene.

**Hint:** Look for common moth repellents that are either natural or synthetic.

### Step 2: Understand the Function of Moth Repellents
Moth repellents work by emitting a scent that is unpleasant to moths, thus keeping them away from clothing and other materials. We need to understand which compounds have this property.

**Hint:** Research the mechanism of action of moth repellents to understand how they deter moths.

### Step 3: Analyze Hexachloroethane
According to the video, hexachloroethane is mentioned but primarily as a plasticizer for cellulose ester and as a component in insecticidal formulations. While it may have some insecticidal properties, it is not typically known as a moth repellent.

**Hint:** Consider the primary uses of the compounds mentioned and whether they are specifically designed to repel moths.

### Step 4: Compare with Known Moth Repellents
Compare hexachloroethane with known moth repellents such as naphthalene and paradichlorobenzene. These compounds are well-documented for their effectiveness in repelling moths.

**Hint:** Look for studies or literature that support the use of specific compounds as effective moth repellents.

### Step 5: Conclusion
Based on the analysis, while hexachloroethane has some insecticidal properties, it is not the most recognized or effective moth repellent. Compounds like naphthalene or paradichlorobenzene are more commonly used for this purpose.

**Hint:** Summarize your findings by identifying the most effective moth repellent from the options provided.

### Final Answer
Naphthalene and paradichlorobenzene are commonly used as moth repellents, while hexachloroethane is not primarily recognized for this purpose.