The solvents used for stain removal are :

Question

Accepted Answer

Option 4, "All options are correct," is the correct answer because each of the solvents listed—petrol, benzene, and ether—can be used for stain removal, depending on the type of stain and the material involved.

1. **Petrol**: Petrol is a non-polar solvent that is effective in dissolving non-polar substances such as oils and greases. It is commonly used in dry cleaning and for removing oil-based stains from fabrics. Its ability to dissolve greasy and oily stains makes it a valuable solvent in stain removal processes.

2. **Benzene**: Benzene is another non-polar solvent that can dissolve a wide range of organic compounds. It is effective in removing stains that are organic in nature, such as tar, grease, and certain dyes. However, due to its toxicity and carcinogenic properties, its use is limited and often replaced by safer alternatives in modern applications.

3. **Ether**: Ether is a volatile solvent that is effective in removing a variety of stains, particularly those that are organic or oil-based. It is often used in laboratory settings for its ability to dissolve fats, oils, and waxes. Its quick evaporation rate also makes it useful for stain removal without leaving residue.

By acknowledging that all three solvents—petrol, benzene, and ether—have properties that make them suitable for stain removal, Option 4 correctly encompasses the versatility and applicability of these solvents in different stain removal scenarios. Each solvent has its own strengths and is chosen based on the specific requirements of the stain and the material being treated. Therefore, Option 4 is the most comprehensive and accurate choice.