12th Class Chemistry Aldehydes, Ketones and Carboxylic Acids / ऐल्डिहाइड, कीटोन तथा कर्बोक्सिलिक अम्ल Question Bank 12th CBSE Chemistry Aldehydes, Ketones

  • question_answer
    Why are aldehydes more reactive than ketones?

    Answer:

                    Aldehydes are more reactive than ketones due to the following two reasons : (i) Due to smaller \[+I\]-effect of one alkyl group in aldehydes as compared to larger \[+I\]-effect of two alkyl groups, the magnitude of positive charge on the carbonyl carbon is more in aldehydes than in ketones. As a result, nucleophilic addition reactions occur more readily in aldehydes than in ketones. (ii) Due to presence of a H-atom on the carbonyl group, aldehydes can be more easily oxidised than ketones. As a result, aldehydes act as reducing agents and thus reduce Tollens' reagent, Fehling's solution, etc.


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