The number of possible stereoisomers for glucose is .......... .

Which statement is correct for the given disaccharide?

Which of the following statements is incorrect about $\alpha-D$-glucopyranose and $\beta-D$-glucopyranose?

Glucose is a

Identify the non-reducing sugar.

Assertion : Treatment of $D$-glucose with dilute alkali affords an equilibrium mixture consisting of $D$-mannose,$D$-fructose and starting substance $D$-glucose.
Reason : The reaction involves an intermediate in which hybridization of $C_2$ changes from $sp^3$ to $sp^2$.