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Iodoform

Oxidation

Propanal+ Dicromate (acidified)

= Propanoic acid (Green)

Test for methyl carbonyls (Does not work for propanal)

Propanone + Dichromate (acidified)

= No reaction (orange)

NMR Spetrum

Mass spectrum

Propanone

Propanal

Structural Formula

Propanal

Tollen's solution

Propanone

Brady's

Both of the propanal and propanone give yellow-red precipitate, both and be recrystalized to test the melting points.

Tollens' reagent contains the diamminesilver(I) ion, [Ag(NH3)2]+.

ketone No change in the colourless solution.

aldehyde The colorless solution produces a grey precipitate of silver, or a silver mirror on the test tube.

Fehling's solution

Propanal turns red as the Cu2+ gets reduced to solid Cu

Propanone Does noting, stays blue.

Propanone vs propanal

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