Glucose gives a silver mirror with ammoniacal silver nitrate because it has an

Step-by-step solution

Glucose is an aldohexose, which means it contains an aldehyde group. Ammoniacal silver nitrate solution is known as Tollen's reagent. Aldehydes reduce Tollen's reagent to metallic silver, which deposits on the inner walls of the test tube to form a silver mirror. Therefore, glucose gives a silver mirror with ammoniacal silver nitrate because it has an aldehyde group. Answer: aldehyde group