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MHT CET202615 April 2026Morning ShiftChemistryBiomoleculesActual

Which of the following is confirmed by the reaction of glucose with hydroxylamine?

Options

  1. AStraight chain of six carbon atoms
  2. BCarbonyl group
  3. CPrimary alcoholic group
  4. DSecondary alcoholic group

Correct answer

B. Carbonyl group

Step-by-step solution

Glucose reacts with hydroxylamine ( NH₂OH ) to form an oxime. This reaction is a characteristic property of aldehydes and ketones, which confirms the presence of a carbonyl group ( >C=O ) in the glucose molecule. The reaction with hydrogen iodide ( HI ) confirms the straight chain of six carbon atoms, while oxidation with nitric acid confirms the primary alcoholic group. Answer: Carbonyl group

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