Question

How do you explain the presence of 5 oh groups in glucose molecule?

Answer 1

Hi, please consider the answer given below

Well, we have to  first appreciate the fact that the number of OH groups in a glucose molecule are five.

These OH groups are sometimes in the axial or the equitorial position.

These positions occupied by the OH groups makes them to be unstable or stable,

For instance a glucose molecule is stable when the anomeric OH group is in equitorial position.

Answer 2

To prove the presence of the 5 -OH groups:  

The presence of 5 -OH group is confirmed by the acetylation of glucose with acetic acid which gives glucose pentaacetate.