Which of the following chemical solutions is known as Tollen's reagent and is used to distinguish between aldehydes and ketones?

💡 Solution & Explanation

Tollen's reagent is an ammoniacal silver nitrate solution that oxidizes aldehydes to produce a characteristic silver mirror on the glass surface, leaving ketones unreactive. Other chemical solutions listed serve different analytical purposes, such as testing for unsaturation or differentiating alcohol classes.