Asked in PMC Practice Test 12 (2021) 2021Moderate

The method which is used on an industrial scale for the production of alcohol from alkene?

Correct answer: C. Hydration of alkenes

  • A. Hydrohalogenation of alkenes
  • B. Dehydration of alkenes
  • C. Hydration of alkenes
  • D. Hydroxylation of alkenes

Explanation

he method that is used on an industrial scale for the production of alcohol from alkene is hydration of alkenes. This is a reversible reaction that is catalyzed by acids or bases. The acid-catalyzed hydration of alkenes is the most common method used in industry. In the acid-catalyzed hydration of alkenes, the alkene is first protonated by the acid. The protonated alkene then reacts with water to form an alcohol. The reaction is exothermic, so the heat is removed to keep the reaction from going to completion. The alcohol is then separated from the water by distillation. On an industrial scale, alcohols are often produced from alkenes through the process of hydration. Hydration involves the addition of water (H2O) to an alkene, resulting in the formation of an alcohol. The reaction is typically catalyzed by an acid, such as sulfuric acid (H2SO4) or phosphoric acid (H3PO4). For example, let's consider the hydrogenation of ethene to ethanol: C2H4 + H2 → C2H5OH During the hydration of alkenes, the double bond between carbon atoms in the alkene is broken, and a hydrogen atom from water and a hydroxyl group (-OH) are added to the carbon atoms. This results in the formation of an alcohol.

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About Alkenes

Alkenes are unsaturated hydrocarbons containing a carbon-carbon double bond with sigma and pi components and restricted rotation. Their reactions include electrophilic addition of hydrogen, halogens, hydrogen halides and water, with Markovnikov orientation, oxidation, combustion and polymerisation, while their preparation commonly involves elimination from alkyl halides or alcohols.

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