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JEE Main 202310 AprilEvening Shift
Exam
JEE Main
Year
2023
Date
10 April
Shift
Evening Shift
Subject
Chemistry
Chapter
Alcohols Phenols and Ethers

JEE Main 2023 · 10 April · Evening Shift · Chemistry · Alcohols Phenols and Ethers

Incorrect method of preparation for alcohols from the following is:

Incorrect method of preparation for alcohols from the following is:

Options

  1. AReaction of Ketone with RMgBrRMgBr followed by hydrolysis.
  2. BReaction of alkyl halide with aqueous NaOHNaOH.
  3. CHydroboration-oxidation of alkene.
  4. DOzonolysis of alkene

Correct answer

D. Ozonolysis of alkene

Step-by-step solution

Reacting a Grignard reagent with a ketone gives a tertiary alcohol. When alkyl halide reacts with aqueous sodium hydroxide to give alcohol, the reaction is called nucleophilic substitution. The Hydroboration Oxidation reaction is an organic chemical reaction which is employed for the conversion of alkenes into alcohols that are neutral. Reductive ozonolysis of alkenes will lead to formation of aldehyde or ketones, oxidative ozonolysis of alkenes will lead to formation of carboxylic acids or ketones.

So, alcohol is not formed by ozonolysis of alkenes.

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