Aldehydes & Ketones 0.0 / 5 ? ChemistryWhat's in a medicine?A2/A-levelOther Created by: J.E.C.Created on: 09-04-14 15:16 What is a drug? A substance that alters the way the body works. 1 of 10 Carbonyl compounds consist of...? Aldehydes & ketones 2 of 10 How would you distinguish between an aldehyde and a ketone? Add a few drops of the aldehyde or ketone to Fehling's solution and warm gently. 3 of 10 What are the possible outcomes of the test with Fehling's solution? An aldehyde: Blue --> Orange (red). Ketone: no colour change. 4 of 10 Explain what happens when an aldehyde is added to Fehling's solution? The aldehyde oxidises the copper(II) ions to copper (I) ions. 5 of 10 What are the products of reduction of aldehydes and ketones? State if either can also be oxidised? Aldehydes: Primary alcohols & can be oxidised to carboxylic acids. Ketones: Secondary alcohols, cannot be oxidised. 6 of 10 All aldehydes and ketones undergo ___ ___ reactions with Hydrogen Cyanide in the presence of an alkali? Nucleophilic Addition 7 of 10 Hydrogen Cyanide is a ___ ___ acid and produces few ___ ions? very weak, CNֿ 8 of 10 A ___ is added to produce ___ ___ ions? base, nucleophilic CNֿ ions 9 of 10 Why is this reaction an example of nucleophilic addition? The first step involves attack by a nucleophile. 10 of 10
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