Q.
Which of the following will not undergo disproportionation reaction on heating with concentrated alkali?
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AMUAMU 2011Aldehydes Ketones and Carboxylic Acids
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Solution:
Aldehyde containing number. α−H atom on reaction with concentrated alkali, undergoes disproportionation reaction. This is also known as Cannizzaros reaction. Since propanal contains α−H atom hence it will not undergo disproportionation reaction. Propanal gives aldol condensation with dil. alkali.
