Q56.Which of the following compounds will most readily be dehydrated to give alkene under acidic condition? (1) 4 - Hydroxypentan - 2-one (2) 3- Hydroxypentan-2-one (3) 1-Pentanol (4) 2-Hydroxycyclopentanone
What This Question Tests
This question assesses the ease of acid-catalyzed dehydration. The stability of the carbocation intermediate formed determines the reaction rate. 4-Hydroxypentan-2-one can form a stable tertiary carbocation, leading to the most facile dehydration.
Concepts Tested
📚 NCERT Sections This Tests
7.7 — Predict The Major Product Of Acid Catalysed Dehydration Of
Chemistry Class 12 · Chapter 7
7.7 Predict the major product of acid catalysed dehydration of (i) 1-methylcyclohexanol and (ii) butan-1-ol
7.21 — Name The Reagents Used In The Following Reactions:
Chemistry Class 12 · Chapter 7
7.21 Name the reagents used in the following reactions: (i) Oxidation of a primary alcohol to carboxylic acid. (ii) Oxidation of a primary alcohol to aldehyde. (iii) Bromination of phenol to 2,4,6-tribromophenol. (iv) Benzyl alcohol to benzoic acid. (v) Dehydration of propan-2-ol to propene. (vi) Butan-2-one to butan-2-ol.
7.13 — Show How Will You Synthesise:
Chemistry Class 12 · Chapter 7
7.13 Show how will you synthesise: (i) 1-phenylethanol from a suitable alkene. (ii) cyclohexylmethanol using an alkyl halide by an SN2 reaction. (iii) pentan-1-ol using a suitable alkyl halide?
📋 Question Details
- Chapter
- Alcohols Phenols Ethers
- Topic
- Dehydration of Alcohols
- Year
- 2018
- Shift
- 16 Apr Online
- Q Number
- Q56
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 11: Alcohols, Phenols and Ethers
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