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Chemistry · 2024 · 3 marks
Haloalkanes and HaloarenesChemical Reactions of Haloalkanes and Haloarenes3 marksAnalyseshort answer
CBSE 2024 · Region 3 · Set 1 · Q25
(a) What type of nucleophilic substitution ( S_N 1. or. S_N 2) occurs in the hydrolysis of 2-Bromobutane to form (±)-Butan-2-ol? Give reason. (b)…
(a)
What type of nucleophilic substitution $\displaystyle \left(\mathrm{S}_{\mathrm{N}} 1\right.$ or $\displaystyle \left.\mathrm{S}_{\mathrm{N}} 2\right)$ occurs in the hydrolysis of $\displaystyle 2$-Bromobutane to form (±)-Butan-$\displaystyle 2$-ol ? Give reason.
(b)
What happens when chlorobenzene and methyl chloride are treated with sodium metal in dry ether ?
Marking-scheme solution
(a)
SN1
Due to the formation of planar carbocation which can be attacked from both sides. / SN1 reactions are accompanied by racemization.
(b)
Toluene is formed /
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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.