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Chemistry · 2022 · 2 marks
Aldehydes, Ketones and Carboxylic AcidsChemical Reactions of Aldehydes, Ketones and Carboxylic Acids2 marksUnderstandvery short answer
CBSE 2022 · Region 4 · Set 3 · Q3
(i) ( CH_3)_3 C - CHO does not undergo aldol condensation. Why? (ii) Distinguish between Acetophenone and Benzophenone with the help of a chemical…
(i)
$\displaystyle \left(\mathrm{CH}_{3}\right)_{3} \mathrm{C}-\mathrm{CHO}$ does not undergo aldol condensation. Why ?
(ii)
Distinguish between Acetophenone and Benzophenone with the help of a chemical test.
Marking-scheme solution
(i) It does not have \(\displaystyle \alpha\)-hydrogen.
(ii) Add \(\displaystyle \left(\mathrm{NaOH}+\mathrm{I}_{2}\right)\) and heat, acetophenone gives yellow precipitate of iodoform while benzophenone does not.
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CBSE Class 12 Chemistry past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.