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Chemistry · 2023 · 2 marks
Aldehydes, Ketones and Carboxylic AcidsChemical Reactions of Aldehydes, Ketones and Carboxylic Acids2 marksUnderstandvery short answer
CBSE 2023 · Region 3 · Set 1 · Q23
Give reasons for the following: (a) Carboxylic carbon is less electrophilic than Carbonyl carbon of aldehydes and ketones. (b) Propanal is more…
Give reasons for the following:
(a)
Carboxylic carbon is less electrophilic than Carbonyl carbon of aldehydes and ketones.
(b)
Propanal is more reactive than Propanone towards addition of HCN.
Marking-scheme solution
(a) Due to resonance of carboxyl carbon with - OH group / explanation through resonating structures.
(b) Due to the steric effect and electronic reasons.
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CBSE Class 12 Chemistry past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.