Glucose $\xrightarrow{Br_2 - H_2O}$ Product; Product is

The product obtained in the reaction is:

The two forms of $D$-glucopyranose obtained from the solution of $D$-glucose are called:

Which of the following on hydrolysis forms invert sugar?

Lactose on hydrolysis gives

$\alpha-D$-glucose and $\beta-D$-glucose differ from each other due to the difference in the configuration of their carbon atom at: