Question

Which one of the following is a powerful disinfectant?

• A. Phenol
• B. Dettol
• C. Soap
• D. Sanitizer

Answer 1

Answer:

A. Phenol

Properties and Uses of Disinfectants

• Chlorine (Cl₂): Widely used for water purification and as a swimming pool disinfectant. It acts by oxidizing the cell membranes and internal structures of microorganisms, effectively killing bacteria and viruses.

• Bleaching Powder (Calcium Oxychloride, CaOCl₂): A common, powerful disinfectant used for water treatment and sanitation. It releases chlorine gas when in contact with water, which destroys pathogens.

• Ozone (O₃): A potent oxidizer used for water treatment in some municipal systems. It is effective against a wide range of waterborne pathogens and leaves fewer chemical residues compared to chlorine.

• Iodine: Often used in tablet or liquid form for emergency water disinfection in small quantities.

• Hydrogen Peroxide (H₂O₂): Acts as a strong oxidizing agent used in sanitization and for treating wounds, though it decomposes quickly into water and oxygen.