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MHT CET202613 April 2026Morning ShiftChemistryAlcohols Phenols and EthersActual

Identify the alcohol obtained when aldehyde other than formaldehyde is treated with Grignard's reagent followed by hydrolysis.

Options

  1. APrimary alcohol
  2. BSecondary alcohol
  3. CTertiary alcohol
  4. DKetone

Correct answer

B. Secondary alcohol

Step-by-step solution

Formaldehyde reacts with Grignard reagent to form primary alcohols. Aldehydes other than formaldehyde react with Grignard reagent to form secondary alcohols. Ketones react with Grignard reagent to form tertiary alcohols. The reaction of an aldehyde ( R'CHO ) with Grignard reagent ( RMgX ) proceeds as follows: R'CHO + RMgX R'-CH(OMgX)-R Hydrolysis of the intermediate adduct gives a secondary alcohol: R'-CH(OMgX)-R + H₂O R'-CH(OH)-R + Mg(OH)X Thus, a secondary alcohol is obtained. Answer: Secondary alcohol

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