NEET 2025 · ChemistryGlucose structurePrevious Year Question
Sugar 'X': A. is found in honey B. is a keto sugar C. exists in α and β anomeric forms D. is laevorotatory 'X' is
- A.Maltose
- B.Sucrose
- C.D-Glucose
- D.D-Fructose✓
Correct Answer
(D) D-Fructose
Solution & Explanation
\textbf{Answer:} (D) All four clues — present in honey, a keto sugar, exists in α/β anomeric forms, and laevorotatory — describe D-Fructose. \textbf{Solution:} Honey is rich in glucose and fructose, so clue A fits. Fructose is a ketohexose \ce{C6H12O6} (a keto sugar), satisfying clue B. It cyclises to α-D-fructofuranose and β-D-fructofuranose, giving the α/β anomeric forms of clue C. Fructose rotates plane-polarised light to the left (laevorotatory), satisfying clue D. All four statements point to D-Fructose, so option D is correct.
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