Q46. Maleic anhydride Maleic anhydride can be prepared by : (1) Heating trans-but-2-enedioic acıd (2) Heating cis-but-2-enedioic acid (3) Treating cis-but-2-enedioic acid with alcohol and (4) Treating trans-but-2-enedioic acid with alcohol acid and acid JEE Main 2021 (25 Jul Shift 2) JEE Main Previous Year Paper
What This Question Tests
This question tests the understanding that intramolecular dehydration to form a cyclic anhydride is possible only with cis-dicarboxylic acids due to the correct stereochemical arrangement.
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.
8.5 — Draw Structures Of The Following Derivatives.
Chemistry Class 12 · Chapter 8
8.5 Draw structures of the following derivatives. (i) The 2,4-dinitrophenylhydrazone of benzaldehyde (ii) Cyclopropanone oxime (iii) Acetaldehydedimethylacetal (iv) The semicarbazone of cyclobutanone (v) The ethylene ketal of hexan-3-one (vi) The methyl hemiacetal of formaldehyde 255 Aldehydes, Ketones and Carboxylic Acids Reprint 2025-26
📋 Question Details
- Chapter
- Aldehydes Ketones Carboxylic Acids
- Topic
- Dehydration of dicarboxylic acids
- Year
- 2021
- Shift
- 25 Jul Shift 2
- Q Number
- Q46
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 12: Aldehydes Ketones Carboxylic Acids
More from this Chapter
Q80.The increasing order of the rate of HCN addition to compounds A −D is (A) HCHO (B) CH3COCH3 (C) PhCOCH3 (D) PhCOPh (1) A < B < C < D (2) D < B < C < A (3) D < C < B < A (4) C < D < B < A
Q78. In the following sequence of reactions, the compound ' D ' is (1) butanal (2) n−butyl alcohol (3) n−propyl alcohol (4) propanal
Q57.In Cannizzaro reaction qiven below (1) the attack of : OH at the carboxyl group (2) the transfer of hydride to the carbonyl group (3) the abstraction of proton from the carboxylic (4) the deprotonation of PhCH2OH group JEE Main 2009 JEE Main Previous Year Paper
Q58.A liquid was mixed with ethanol and a drop of concentrated H2SO4 was added. A compound with a fruity smell was formed. The liquid was: (1) CH3OH (2) HCHO (3) CH3COCH3 (4) CH3COOH