A known artificial sweetener X is composed of 4-chloro-4-deoxy-α-D-galactose and 1,6-dichloro-1,6-dideoxy-β-D-fructose joined by a glycosidic linkage. Structure of D-galactose is given below:
The correct structure of X is:
(A)(see structure)✓ Correct
(B)(see structure)
(C)(see structure)
(D)(see structure)
Answer: (A)
Solution
The artificial sweetener described is sucralose. It is formed by joining 4-chloro-4-deoxy-α-D-galactose and 1,6-dichloro-1,6-dideoxy-β-D-fructose through a glycosidic linkage.
In the correct structure:
The galactose unit has Cl at C-4 position (replacing OH)
The fructose unit has Cl at C-1 and C-6 positions (replacing OH groups)
The glycosidic linkage connects C-1 of galactose (α-configuration) to C-2 of fructose (β-configuration)
Option (A) shows the correct structure with all chlorine substitutions and the proper glycosidic linkage.
JEE Advanced · 2026 · 17 May 2026 · Paper 2 · Single correct option
