NEET 2025 — Chemistry solution

NEET2025Chemistry

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
D-Glucose
B
D-Fructose
C
Maltose
D
Sucrose

Solution

D-Fructose fits all four clues: it is the major ketohexose (keto sugar) found in honey, exists as $α$ - and $β$ -furanose/pyranose anomers, and is laevorotatory (rotates plane-polarised light to the left, [ $α$ ] $_{D}$ ≈ $- 9 2^{\circ}$ ).

D-Glucose is an aldose and is dextrorotatory; maltose and sucrose are disaccharides.

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