✓ Board-verified
Chemistry · 2025 · 1 mark
CBSE 2025 · Region 4 · Set 1 · Q12
Alkenes are formed by heating alcohols with conc. H_2 SO_4. The first step in the reaction is:
Alkenes are formed by heating alcohols with conc. $\displaystyle \mathrm{H}_{2} \mathrm{SO}_{4}$. The first step in the reaction is :
Official answer
(C)
protonation of alcohol molecule
All Alcohols, Phenols and Ethers questions2025 question paperNCERT solutions: Alcohols, Phenols and EthersPractice Alcohols, Phenols and Ethers →
More from Alcohols, Phenols and Ethers
- In the reaction R-OH+HCl →ZnCl_2 RCl+H_2 O, what is the correct order of reactivity of alcohols?2025 · asked 2×
- Assertion: Alcohols act as Bronsted bases as well as Bronsted acids. Reason (R): Alcohols react as both nucleophiles and electrophiles. []2026
- Show how you will synthesise: from a suitable alkene. from methanal using a suitable Grignard reagent.2023
- Assertion: p-nitrophenol is less acidic than phenol. Reason (R): Nitro group is electron withdrawing and helps in the stabilisation of…2024
- Sodium phenoxide when heated with CO_2 under pressure, followed by acidification, yields:2023
- Can sodium ethoxide and t-butyl chloride be used for the preparation of t-butyl ethyl ether? Give suitable explanation. Justify your answer by…2025
- Write chemical equations for the following reactions: (Do any three) Hydroboration - oxidation reaction Williamson Synthesis Friedel-Crafts…2024
- What will be formed after oxidation reaction of secondary alcohol with chromic anhydride (CrO_3)?2025
CBSE Class 12 Chemistry past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.