Phenol reacts with concentrated H2SO4 to give:
Correct answer: C. Ortho and para hydroxy benzene sulphonic acid
- A. Ortho hydroxy benzene sulphonic acid
- B. Meta hydroxy benzene sulphonic acid
- C. Ortho and para hydroxy benzene sulphonic acid
- D. Para hydroxy benzene sulphonic acid
Explanation
Explanation:This product is formed in the reaction of phenol with concentrated sulfuric acid. The -SO3H group can be substituted at either the Ortho or para positions on the benzene ring. Thus, both ortho and para hydroxy benzene sulphonic acid are formed. This product is formed in the reaction of phenol with concentrated sulfuric acid. This product is not formed in the reaction of phenol with concentrated sulfuric acid. This product is also formed in the reaction of phenol with concentrated sulfuric acid.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
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About Phenols
Phenols contain a hydroxyl group directly bonded to an aromatic ring, making them more acidic than alcohols because the phenoxide ion is resonance-stabilised. Reactions include ionisation with bases, electrophilic substitution, bromination, nitration and oxidation, with attention to the difference between phenols and aliphatic alcohols.
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