What is mutarotation? How can you explain the predominance of β-D-glucopyranose in solution

What is mutarotation? How can you explain the predominance of β-D-glucopyranose in solution after standing? What other forms of glucose are in solution? Write formulas. Basic tautomeric forms of glucose in solution. Write their formulas.

Mutarotation is a change in optical rotation due to a change in equilibrium between two anomers, when the corresponding stereocenters mutually transform. Cyclic sucrose mutarotation as α and β-abnormal forms interconverts. The optical rotation of the solution depends on the optical rotation of each anomer and their ratio in the solution.

Mutarotation was discovered by the French chemist Dubrunfaut in 1846, when he noticed that the specific turnover of an aqueous solution of sugar changes over time.