Choose the correct option for structures of A and B, respectively
Biomolecules · Class 12 · JEE Main Previous Year Question
Choose the correct option for structures of A and B, respectively
- a✓
Option a
- b
Option b
- c
Option c
- d
Option d
Option a
Step 1: Identifying the Start — The starting molecule is . Reaction with bromine water oxidizes the aldehyde group to a carboxyl group (product A = gluconic acid).
Step 2: Strong Oxidation — Subsequent oxidation with concentrated nitric acid () targets both the aldehyde and the primary alcohol, yielding a dicarboxylic acid (product B = saccharic acid).
Step 3: Matching Structures — Analyzing the provided structures in the image, option (a) correctly represents the Fischer projections for gluconic and saccharic acids.
Remember: Mild oxidants affect only the aldehyde, while strong oxidants affect both chain ends.
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