COMEDK · Chemistry · 26. Alcohols Phenols and Ethers
Choose the incorrect statement.
- A In the acid catalysed hydration of Ethene, an Oxonium ion is formed when it reacts with \(\mathrm{H}_3 \mathrm{O}^{+}\)and a Carbocation is formed when the Oxonium ion reacts with water.
- B Cresols are less acidic than Phenol because electron releasing groups do not favour formation of Phenoxide ion.
- C Ethanol acts as Nucleophile when the \(\mathrm{O}-\mathrm{H}\) bond is broken and acts as Electrophile on getting protonated.
- D In the reaction between Ethanol and Conc. \(\mathrm{H}_2 \mathrm{SO}_4\) at 413 K , an Oxonium ion is formed when Ethanol gets protonated.
Answer & Solution
Correct Answer
(A) In the acid catalysed hydration of Ethene, an Oxonium ion is formed when it reacts with \(\mathrm{H}_3 \mathrm{O}^{+}\)and a Carbocation is formed when the Oxonium ion reacts with water.
Step-by-step Solution
Detailed explanation
In the acid catalysed hydration of ethene, the mechanism involves the protonation of ethene by \(\mathrm{H}_3\mathrm{O}^{+}\) to form a carbocation intermediate, not an oxonium ion. The water molecule then acts as a nucleophile to attack the carbocation. Thus, the statement in…
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