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Biomolecules — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryBiomolecules2 Marks
Question
List the reactions of glucose which cannot be explained by its open chain structure.
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Answer

  1. Despite having the aldehyde group, glucose does not give $2, 4-\text{DNP}$ test or Schiff’s test.
  2. It does not form the hydrogensulphite addition product with $\ce{NaHSO_3}$.
  3. The pentaacetate of glucose does not react with hydroxylamine indicating the absence of free $–\text{CHO}$ group.

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