Question

If $\alpha$ D-glucose is dissolved in water and kept for a few hours, the major constituent (s) present in the solution is (are)

• A. $\alpha$-D-glucose
• B. mixture of$\beta$-D-glucose and open chain D-glucose
• C. open chain D-glucose
• D. mixture of $\alpha$-D-glucose and $\beta$-D-glucose

Answer 1

Answer: (D)

If $\alpha$-D-glucose is dissolved in water and kept for a few hours, the major constituents present in the solution is a mixture of $\alpha$-D glucose and $\beta$-D glucose. These two cyclic form exist in equilibrium with open chain structure.