CBSE 2025 · Region 4 · Set 1 · Q12 · 1 mark
Alkenes are formed by heating alcohols with conc. $\displaystyle \mathrm{H}_{2} \mathrm{SO}_{4}$. The first step in the reaction is :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
protonation of alcohol molecule
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CBSE Class 12 Chemistry past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.