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Chemistry · 2026 · 2 marks
Haloalkanes and HaloarenesChemical Reactions of Haloalkanes and Haloarenes2 marksApplyvery short answer
CBSE 2026 · Region 3 · Set 1 · Q17
For the compound having molecular formula C_4 H_9 Br, write: (a) the isomer which is most reactive towards S_N 1 displacement. (b) the isomer which,…
For the compound having molecular formula $\displaystyle \mathrm{C}_{4} \mathrm{H}_{9} \mathrm{Br}$, write :
(a)
the isomer which is most reactive towards $\displaystyle \mathrm{S}_{\mathrm{N}} 1$ displacement.
(b)
the isomer which, on reacting with Na metal in the presence of dry ether, gives $\displaystyle 2,5$-Dimethylhexane.
Marking-scheme solution
(a)
(CH3)3CBr
(b)
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CBSE Class 12 Chemistry past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.