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Chemistry · 2023 · 3 marks
CBSE 2023 · Region 3 · Set 1 · Q27
(a) Write the structures of A, B and C in the following reactions: (ii) CH_3 CH_2 Br → KCN A → LiAlH_4 B →[0^° C ] HNO_2 C
Write the structures of A, B and C in the following reactions:
(i)
(ii)
$\displaystyle \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Br} \xrightarrow{\mathrm{KCN}} \mathrm{A} \xrightarrow{\mathrm{LiAlH}_{4}} \mathrm{~B} \xrightarrow[0^{\circ} \mathrm{C}]{\mathrm{HNO}_{2}} \mathrm{C}$
How will you convert the following:
(i)
Aniline to p-bromoaniline
(ii)
Ethanoic acid to methanamine
(iii)
Butanenitrile to $\displaystyle 1$-aminobutane
Marking-scheme solution
(a) (i)
(ii) \(\displaystyle \mathrm{A}=\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CN} \quad \mathrm{B}=\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2} \quad \mathrm{C}=\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}\)
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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.