Use Tollens' and Fehling's reagents to distinguish aldehydes from ketones.

In the subtopic Aldehydes and ketones (A-level only), this AQA A-Level Chemistry 7405 learning objective focuses on use Tollens' and Fehling's reagents to distinguish aldehydes from ketones. It belongs to Aldehydes and ketones (A-level only), so revision should stay anchored to this exact subtopic rather than drifting into a generic GCSE-level chemistry summary. Approved keywords to use include Fehling, aldehyde, ketone, Tollens. Fehling's reagent. means a solution used to differentiate between aldehydes and ketones, where aldehydes reduce the blue copper(II) ions to a red precipitate Avoid the mistake of students often confuse aldehydes and ketones, thinking they are the same due to both containing a carbonyl group; instead, remember that aldehydes have the carbonyl group at the end of the carbon chain, while ketones have it within the chain For exam answers, use Tollens' reagent to test for aldehydes and Fehling's reagent for ketones