Aldehydes and Ketones: Fehling's Solution and Special Tests
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Questions and Answers

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.

<p>usual</p> Signup and view all the answers

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

<p>neutral</p> Signup and view all the answers

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

<p>carbonyl</p> Signup and view all the answers

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

<p>Fehling's</p> Signup and view all the answers

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

<p>formaldehyde</p> Signup and view all the answers

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

<p>iodoform</p> Signup and view all the answers

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

<p>aldehydes</p> Signup and view all the answers

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.

<p>alkali</p> Signup and view all the answers

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.

<p>Cannizzaro</p> Signup and view all the answers

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

<p>acids</p> Signup and view all the answers

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

<p>aldehydes</p> Signup and view all the answers

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

<p>aldehydes</p> Signup and view all the answers

Aldehydes are usually more reactive than ketones towards ______ addition.

<p>nucleophilic</p> Signup and view all the answers

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

<p>carbon-nitrogen</p> Signup and view all the answers

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

<p>reagent</p> Signup and view all the answers

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