Which of the following major product(s) is formed when phenol reacts with sulphuric acid at 100 °C?
Correct answer: B. Para-hydroxy benzene sulphonic acid
- A. Ortho-hydroxy benzene sulphonic acid
- B. Para-hydroxy benzene sulphonic acid
- C. Meta-hydroxybenzene sulphonic acid
- D. Both a and b
Explanation
The reaction of phenol with concentrated sulphuric acid is thermodynamically controlled. at 25 Celsius the Ortho product predominates while at 100 Celsius the Para product is the major product.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Alcohols and Phenols
535 free Alcohols and Phenols MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.