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Chemistry · 2024 · 3 marks
CBSE 2024 · Region 1 · Set 1 · Q25
(a) Which of the following is an allylic halide? (i) CH_3- CH = CH - Br (ii) (b) Out of chlorobenzene and 2,4,6-trinitrochlorobenzene, which is more…
(a)
Which of the following is an allylic halide ?
(i)
$\displaystyle \mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}-\mathrm{Br}$
(ii)
(b)
Out of chlorobenzene and $\displaystyle 2,4,6$-trinitrochlorobenzene, which is more reactive towards nucleophilic substitution and why ?
(c)
Which isomer of $\displaystyle \mathrm{C}_{4} \mathrm{H}_{9} \mathrm{Cl}$ has the lowest boiling point ?
Marking-scheme solution
(a)
(b) $\displaystyle 2$, $\displaystyle 4$, $\displaystyle 6$- trinitrochlorobenzene, because of electron withdrawing nature of \(\displaystyle -\mathrm{NO}_{2}\) group.
(c) \(\displaystyle \left(\mathrm{CH}_{3}\right)_{3} \mathrm{C}-\mathrm{Cl}\) / tert-butyl chloride
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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.