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Iodoform
Propanal+ Dicromate (acidified)
= Propanoic acid (Green)
Test for methyl carbonyls (Does not work for propanal)
Propanone + Dichromate (acidified)
= No reaction (orange)
Propanal
Propanone
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.
Propanal turns red as the Cu2+ gets reduced to solid Cu
Propanone Does noting, stays blue.