Aldehydes and Ketones: Fehling's Solution and Special Tests

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18 Questions

Aldehydes and ketones have higher boiling points than non-polar compounds due to the presence of the ______ group.

polar carbonyl

Isopropyl alcohol boils at 82.5 ˚C while its oxidation product, ______, boils at 56 ˚C.

acetone

The lower aldehydes and ketones are significantly soluble in water, probably due to ______ between solute and solvent molecules.

H-bonding

Aromatic aldehydes and ketones are insoluble in water and are soluble in the ______ organic solvents.

usual

Both aldehydes and ketones are ______ compounds that don't change the color of litmus paper.

neutral

The chemical reactions of aldehydes and ketones are related to the ______ group.

carbonyl

Aldehydes change the color of ______ solution from blue to green, orange precipitate, and then red precipitate or copper mirror.

Fehling's

Benzaldehyde, salicylaldehyde, and ______ can undergo Cannizzaro reaction because they do not have an alpha hydrogen atom.

formaldehyde

The ______ test is a special test for aldehydes and ketones containing a terminal methyl group.

iodoform

Aromatic ______ do not give a sharp result with Fehling's reagent.

aldehydes

In the presence of concentrated ______, aldehydes containing no α- hydrogens undergo self-oxidation – reduction to yield a mixture of the corresponding alcohol & a salt of the corresponding carboxylic acid.

alkali

The ______ reaction is a redox reaction in which one molecule of the aldehyde serves as the oxidizing agent while the other serves as the reducing agent.

Cannizzaro

Aldehydes are easily oxidized to the corresponding ______ and have reducing properties.

acids

The 2,4-Dinitrophenylhydrazine reagent test is a general test to identify ______ and ketones.

aldehydes

Tollen's reagent is used for differentiation between ______ and ketones.

aldehydes

Aldehydes are usually more reactive than ketones towards ______ addition.

nucleophilic

An imine is a functional group or chemical compound containing a ______ double bond.

carbon-nitrogen

Fehling's ______ is used to differentiate between aldehydes and ketones.

reagent

Learn about the reactions of aldehydes and ketones with Fehling's solution, including the formation of precipitates and color changes. Discover how aromatic aldehydes and terminal methyl group compounds react differently. Test your understanding of these organic chemistry concepts!

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