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JEE Main · 2020 · 07 Jan 2020 · Shift 2 · Biomolecules

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Which of the following statements is correct?
  1. (A)Gluconic acid is a dicarboxylic acid
  2. (B)Gluconic acid can form cyclic(acetal/hemiacetal) structure
  3. (C)Gluconic acid is a partial oxidation product of glucose✓ Correct
  4. (D)Gluconic acid is obtained by oxidation of glucose with

Answer: (C)

Solution

Gluconic acid comes from the mild oxidation of glucose, in which only the aldehyde is turned into a carboxylic acid while all the other hydroxyl groups stay as they are — a partial oxidation. It carries just one , so it is not dicarboxylic; with the aldehyde gone it can no longer close into a cyclic hemiacetal; and strong would oxidise both ends to give the dicarboxylic glucaric acid instead. The sound description is that gluconic acid is a partial oxidation product of glucose.

JEE Main · 2020 · 07 Jan 2020 · Shift 2 · Single correct option

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