What are $\alpha - D -$ glucose and $\beta - D -$ glucose to each other?

Predict the product of the following reaction:

Molisch's test is done for the detection of

Which of the following tests confirms the presence of an aldehydic group in glucose?

Why does the compound $(A)$ given below not form an oxime?

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