Question

why glucose and ethanol not considered acidic through they contain hydrogen

Answer 1

An acid is something that donates hydrogen ions. For example, HCl dissociates readily to form H+ and Cl-.

Glucose and ethanol are not considered acidic because although they have hydrogen, their hydrogens do not dissociate easily.

Answer 2

AS WHEN THEY ARE DISSOLVED IN WATER THE PRODUCE POSITIVELY CHARGED HYDRONIUM IONS