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Phenol is an aromatic alcohol that is used to prepare many important compounds such as picric acid…
Phenol is an aromatic alcohol that is used to prepare many important compounds such as picric acid. Phenol is widely used in household and industrial settings as a cleaner and disinfectant. It is also used as a primary chemical to make plastics. Phenol is less soluble in water as compared to aliphatic alcohol. Some aliphatic alcohols are toxic and can be addictive.
(i)[1.0]
How is the acid mentioned above prepared from phenol? Write the chemical reaction involved in this preparation.
(ii)[1.0]
‘Phenol is less soluble in water as compared to aliphatic alcohol.’ Explain.
(iii)[1.0]
Write the chemical equation for the preparation of phenol from chlorobenzene.
(iv)[1.0]
An organic compound [A] having molecular formula $\text{C}_4\text{H}_{10}\text{O}$ gives positive Lucas test within five minutes at room temperature. Compound [A] upon oxidation with $\text{K}_2\text{Cr}_2\text{O}_7/\text{H}_2\text{SO}_4$ forms compound [B] which does not respond to Tollen’s test.
Identify compounds [A] and [B].
(v)[1.0]
In the above reaction, compound [B] gets reduced with $\text{Zn/Hg}$ and $\text{HCl}$ and forms compound [C]. Identify compound [C] and write the balanced reaction for the conversion of compound [B] to compound [C].
Answer
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From ISC 2025 Chemistry Paper 1, question 19.