Which of the following is the open-chain structure of D-glucose?

Options

A. Penta-acetyle derivative of glucose
B. Cyanohydrin formation with HCN
C. Reaction with fehling solution
D. Reaction with Tollen's reagent

Answer

A

Explanation

Glucose reacts with acetic anhydride in the presence of anhydrous `ZnCl_(2)` to form penta-acetyle glucose which indicates the presence of 5 -OH groups in glucose molecule and the open chain structure of glucose
`{:(" CHO"),(" |"),(" "(CHOH)_(4)+5(CH_(3)CO)_(2)O overset(ZnCl_(2))underset(Delta)to),(" |"),(" "CH_(2)OH),(" glucose"):} {:(" CHO"),(" |"),(" "(CHOCOCH_(3))_(4)+5CH_(3)COOH),(" |"),(" "CHOCOCH_(3)),(" Penta acetyl glucose"):}`