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MHT CET Medical202622 April 2026Evening ShiftChemistryBiomoleculesActual

Formation of saccharic acid from glucose by oxidation with dilute HNO ₃ , confirms

Options

  1. Aglucose contains five hydroxy groups.
  2. Bthe presence of aldehyde group in glucose.
  3. Cglucose contains one primary alcoholic group.
  4. Dthe six carbon atoms of glucose are in a straight chain.

Correct answer

C. glucose contains one primary alcoholic group.

Step-by-step solution

Oxidation of glucose with dilute HNO ₃ yields saccharic acid, which is a dicarboxylic acid. Dilute HNO ₃ is a strong oxidizing agent that oxidizes both the terminal aldehyde group and the terminal primary alcohol group of glucose into carboxylic acid groups. This reaction specifically confirms the presence of a primary alcoholic group in glucose. Answer: glucose contains one primary alcoholic group.

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