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Biomolecules appeared 36 times across 3 years — 4.2% of Chemistry. This question is from Reactions of Glucose.

Year 2026 2025 2024 Total
Questions 9 19 8 36

Match List-I with List-II.
List-I (Reaction of glucose with)List-II (Product formed)
A. HydroxylamineI. Gluconic acid
B. Br₂ waterII. Glucose pentaacetate
C. Excess acetic anhydrideIII. Saccharic acid
D. Concentrated HNO₃IV. Glucoxime
Choose the correct answer from the options given below:

Solution & Explanation

Related Formula
Glucose + NH₂OH arrow Glucoxime Glucose + Br₂/H₂O arrow Gluconic acid Glucose + (CH₃CO)₂O arrow Glucose pentaacetate Glucose + conc. HNO₃ arrow Saccharic acid
Core Logic

Step 1: Match each reagent with its specific reaction product on glucose:

  • Hydroxylamine (A) reacts with carbonyl to form Glucoxime (IV).
  • Br₂ water (B) mildly oxidizes -CHO to -COOH forming Gluconic acid (I).
  • Acetic anhydride (C) acetylates 5 hydroxyl groups to form Glucose pentaacetate (II).
  • Conc. HNO₃ (D) oxidizes both -CHO and primary -CH₂OH to form Saccharic acid (III).
  • Step 2: Correct matching pair is A-IV, B-I, C-II, D-III.

    Chemical reactions chart for glucose for Q60 - JEE Main 2026 Evening
    Chemical reactions chart for glucose for Q60 - JEE Main 2026 Evening

Pattern Recognition

Sees: Classic NCERT Glucose chemical test reaction matches. Shortcut: Mild oxidant Br₂/H₂O arrow Gluconic acid; Strong oxidant HNO₃ arrow Saccharic acid.

Chapter Mix

Class 12 Chemistry: Biomolecules

Reference Study Guides

More Biomolecules Previous-Year Questions — Page 8

Q78 jee_main_2024_31_jan_morning Reactions of Glucose
Match List I with List II
LIST-ILIST-II
A. Glucose/NaHCO₃/ΔI. Gluconic acid
B. Glucose/HNO₃II. No reaction
C. Glucose/HI/ΔIII. n-hexane
D. Glucose/Bromine waterIV. Saccharic acid
Choose the correct answer from the options given below:
  • A. A-IV, B-I, C-III, D-II
  • B. A-II, B-IV, C-III, D-I
  • C. A-III, B-II, C-I, D-IV
  • D. A-I, B-IV, C-III, D-II

Solution

Core Logic

Matching the reactions of glucose: (A) Glucose does not react with NaHCO₃, so there is no reaction. (A arrow II) (B) Oxidation of glucose with strong oxidizing agents like HNO₃ yields a dicarboxylic acid called saccharic acid. (B arrow IV) (C) Prolonged heating of glucose with HI forms n-hexane, indicating a straight chain of six carbon atoms. (C arrow III) (D) Oxidation with mild agents like bromine water converts glucose to gluconic acid. (D arrow I)

Chapter Mix

Class 12 Chemistry: Biomolecules

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