Which of the following is a strong acid?
Correct answer: D. Phenol
- A. Ethane
- B. Ethyl Chloride
- C. Ethanol
- D. Phenol
Explanation
Phenols are much more acidic than alcohols because the negative charge in the phenoxide ion is not localized on the oxygen atom, as it is in an alkoxide ion, but is delocalized-it is shared by a number of carbon atoms in the benzene ring. On ther other hand, ethane and ethyl chloride doesn't display acidic behavior. Thus, option D is correct.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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