In D - glucose ( X ) and D - Fructose ( Y ) , which hydroxyl group participates in hemiacetal formation

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In $\mathrm{D}$ - glucose $(\mathrm{X})$ and $\mathrm{D}$ - Fructose $(\mathrm{Y})$, which hydroxyl group participates in hemiacetal formation

ChemistryBiomoleculesJEE Main

Options:

A $\mathrm{C}-5$ in both $\mathrm{X}$ and $\mathrm{Y}$
B $\mathrm{C}-5$ in $\mathrm{X}$ and $\mathrm{C}-6$ in $\mathrm{Y}$
C $C-6$ in $X$ and $C-5$ in $Y$
D $\mathrm{C}-4$ in both $\mathrm{X}$ and $\mathrm{Y}$

Solution:

2257 Upvotes Verified Answer

The correct answer is: $\mathrm{C}-5$ in both $\mathrm{X}$ and $\mathrm{Y}$

In both, glucose and fructose, C-5 atom participates in hemiacetal formation.

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