Glucose and gluconic acid on oxidation with dilute nitric acid forms saccharic acid. This reaction confirms…

Glucose and gluconic acid on oxidation with dilute nitric acid forms saccharic acid. This reaction confirms that glucose contains
  1. four primary alcoholic groups
  2. two primary alcoholic groups
  3. one primary alcoholic groups
  4. five hydroxyl groups

Solution

Only one $-\mathrm{CH}_2-\mathrm{OH}$ convert into $-\mathrm{COOH}$, confirm presence of one primary alcoholic.

Asked in: MHT CET 2021 (20 Sep Shift 1)

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