CBSE 2025 · Region 5 · Set 3 · Q21 · 2 marks
(a)Carboxylic acid is more acidic than phenol. Give reason.(b)Give a chemical test to distinguish between benzaldehyde and acetophenone.
(a)
Carboxylic acid is more acidic than phenol. Give reason.
(b)
Give a chemical test to distinguish between benzaldehyde and acetophenone.
Marking-scheme solution
(a)
In carboxylate ion, the negative charge is delocalized over two electronegative
oxygen atoms, hence carboxylate ion is more stable than phenoxide ion./Due to two
equivalent resonating structures of carboxylate ion.
(b)
(a)
Add NaOH and iodine to both the compounds and heat, acetophenone gives
yellow ppt of iodoform (CHI3 ),whereas Benzaldehyde does not.
Aldehydes, Ketones and Carboxylic AcidsMethods of Preparation of Carboxylic AcidsUnderstandvery_short_answermedium
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