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JEE Main Chemistry question

ChemistryAldehydes, Ketones and Carboxylic AcidsJEE Main

The number of aldol reactions that occur in the given transformation, CH₃CHO + 4HCHO (conc. aq. NaOH)→ a tetrahydroxymethyl-substituted product (pentaerythritol), is:

Answer: (C)

Solution

Three successive crossed-aldol additions replace all three α-hydrogens of acetaldehyde's methyl group with –CH₂OH (using three of the four formaldehyde molecules); the fourth

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Question ID VK-149840