Question

Choose the incorrect statement.

• A. In the acid catalysed hydration of Ethene, an Oxonium ion is formed when it reacts with H3O+ 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 O—H bond is broken and acts as Electrophile on getting protonated.
• D. In the reaction between Ethanol and Conc. H2SO4 at 413K, an Oxonium ion is formed when Ethanol gets protonated.

Answer 1

Answer: (A)

A. In the acid catalysed hydration of Ethene, an Oxonium ion is formed when it reacts with H3O+ and a Carbocation is formed when the Oxonium ion reacts with water.

Answer 2

Statement A is incorrect. In acid-catalyzed hydration of ethene:

1. Ethene reacts with H₃O⁺ to form a carbocation (CH₃CH₂⁺), not an oxonium ion.
2. The carbocation then reacts with water to form an oxonium ion (CH₃CH₂OH₂⁺), not a carbocation. The oxonium ion subsequently deprotonates to form the alcohol.