CBSE 2023 · Region 3 · Set 1 · Q34 · 5 marks
(i)An organic compound (X) having molecular formula $\displaystyle \mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}$ can show various properties depending on its structures. Draw each of the structures if it(1)gives positive iodoform test.(2)shows Cannizzaro's reaction.(3)reduces Tollens'reagent and has a chiral carbon.(ii)Write the reaction involved in the following:(1)Wolff-Kishner reduction(2)Hell-Volhard-Zelinsky reaction(i)How can you convert each of the following compounds to Benzoic acid ?(1)Acetophenone(2)Ethylbenzene(3)Bromobenzene(ii)Arrange the following compounds in increasing order of their property as indicated :(1)$\displaystyle \mathrm{O}_{2} \mathrm{~N}-\mathrm{CH}_{2}-\mathrm{COOH}, \mathrm{F}-\mathrm{CH}_{2}-\mathrm{COOH}, \mathrm{CN}-\mathrm{CH}_{2} \mathrm{COOH}$ (Acidic character)(2)Ethanal, Propanal, Butanone, Propanone (Reactivity in nucleophilic addition reactions)
(i)
An organic compound (X) having molecular formula $\displaystyle \mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}$ can show various properties depending on its structures. Draw each of the structures if it
(1)
gives positive iodoform test.
(2)
shows Cannizzaro's reaction.
(3)
reduces Tollens'reagent and has a chiral carbon.
(ii)
Write the reaction involved in the following:
(1)
Wolff-Kishner reduction
(2)
Hell-Volhard-Zelinsky reaction
(i)
How can you convert each of the following compounds to Benzoic acid ?
(1)
Acetophenone
(2)
Ethylbenzene
(3)
Bromobenzene
(ii)
Arrange the following compounds in increasing order of their property as indicated :
(1)
$\displaystyle \mathrm{O}_{2} \mathrm{~N}-\mathrm{CH}_{2}-\mathrm{COOH}, \mathrm{F}-\mathrm{CH}_{2}-\mathrm{COOH}, \mathrm{CN}-\mathrm{CH}_{2} \mathrm{COOH}$ (Acidic character)
(2)
Ethanal, Propanal, Butanone, Propanone (Reactivity in nucleophilic addition reactions)
Marking-scheme solution
(i)
Aldehydes, Ketones and Carboxylic AcidsChemical Reactions of Aldehydes, Ketones and Carboxylic AcidsApplylong_answerhard
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CBSE Class 12 Chemistry past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.