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Chemistry · 2024 · 3 marks
CBSE 2024 · Region 2 · Set 2 · Q25
Write the structures of A, B and C in the following reactions: (a) CH_3- CH_2- Br → KCN A →[ Partial hydrolysis ] OH^- B → NaOH + Br_2 C
Write the structures of A, B and C in the following reactions :
(a)
$\displaystyle \mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{Br} \xrightarrow{\mathrm{KCN}} \mathrm{A} \xrightarrow[\text { Partial hydrolysis }]{\mathrm{OH}^{-}} \mathrm{B} \xrightarrow{\mathrm{NaOH}+\mathrm{Br}_{2}} \mathrm{C}$
(b)
Marking-scheme solution
(a)
\(\displaystyle \mathrm{A}=\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CN}\)
\(\displaystyle \mathrm{B}=\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CONH}_{2}\)
\[\mathrm{C}=\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}
\]
(b)
\(\displaystyle \mathrm{A}=\)
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CBSE Class 12 Chemistry past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.