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Questions and Answers
What defines a substance as a disinfectant?
What is a characteristic of antiseptics compared to disinfectants?
Which phenol has the lowest pKa value?
Which of the following phenols is commonly used in Dettol?
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Which of the following correctly pairs a phenol with its application?
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Study Notes
Phenols
- Phenol is formed when a hydrogen atom in a benzene ring is replaced by a hydroxyl group (-OH).
- Phenol is also known as carbolic acid.
- Phenols have various types and properties.
- Carbolic acid (phenol) has a pKa of 10.
- Ethanoic acid has a pKa of 4.74.
- Methanoic acid has a pKa of 3.74.
- 2-methyl phenol (or ortho cresol) is a type of phenol.
- 4-chloro-3,5-dimethyl phenol is found in Dettol.
- 2,4,6-trinitrophenol (or picric acid) is used in burnol cream for skin burns.
- Phenols are used as both disinfectants and antiseptics due to their mild acidic properties.
- Disinfectants kill bacteria and other microorganisms and are applied to non-living things.
- Antiseptics prevent the growth of bacteria and other microorganisms and kill germs on living tissue.
- A 1% aqueous solution of phenol is a common disinfectant.
- A 0.2% aqueous solution of phenol is a common antiseptic.
- The same chemical can act as both a disinfectant and antiseptic, depending on the application (environment/living).
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Description
This quiz explores the properties and applications of phenols, including their classification as disinfectants and antiseptics. Learn about various phenolic compounds, their pKa values, and their uses in everyday products. Test your knowledge on the significance of phenols in chemistry and medicine.
