Q60.Compound A, C5H10O5 , given a tetraacetate with AC2 O and oxidation of A with Br2 −H2O gives an acid, C5H10O6 . Reduction of A with HI gives isopentane. The possible structure of A is : JEE Main 2023 (31 Jan Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)
What This Question Tests
This question tests the ability to deduce the structure of a monosaccharide based on a series of chemical reactions, including acetylation, oxidation, and reduction, typical of carbohydrate chemistry.
Concepts Tested
📚 NCERT Sections This Tests
6.21 — Primary Alkyl Halide C4H9Br (A) Reacted With Alcoholic Koh To Give Compound (B).
Chemistry Class 12 · Chapter 6
6.21 Primary alkyl halide C4H9Br (a) reacted with alcoholic KOH to give compound (b). Compound (b) is reacted with HBr to give (c) which is an isomer of (a). When (a) is reacted with sodium metal it gives compound (d), C8H18 which is different from the compound formed when n-butyl bromide is reacted with sodium. Give the structural formula of (a) and write the equations for all the reactions.
8.19 — An Organic Compound Contains 69.77% Carbon, 11.63% Hydrogen And Rest Oxygen.
Chemistry Class 12 · Chapter 8
8.19 An organic compound contains 69.77% carbon, 11.63% hydrogen and rest oxygen. The molecular mass of the compound is 86. It does not reduce Tollens’ reagent but forms an addition compound with sodium hydrogensulphite and give positive iodoform test. On vigorous oxidation it gives ethanoic and propanoic acid. Write the possible structure of the compound.
7.10 — Hbr
Chemistry Class 12 · Chapter 7
7.10 HBr C2 H5 OH C2 H5 Br CH3 – CH2 – CH – CH – ONa + C 2H5 Br CH3 – CH2 – CH – CH – OC2 H5 CH3 CH3 CH3 CH3 2-Ethoxy-3-methylpentane 225 Alcohols, Phenols and Ethers Reprint 2025-26
📋 Question Details
- Chapter
- Biomolecules
- Topic
- Monosaccharide structure determination
- Year
- 2023
- Shift
- 31 Jan Shift 2
- Q Number
- Q60
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 14: Biomolecules
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