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Question
Which reagent can differentiate propanal from propanone?
Which reagent can differentiate propanal from propanone?
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Solution
The correct option is A Schiff's reagent
Schiff's
reagent can be used to differentiate between aldehyde and ketones.
Fuschsine or rosaniline hydrochloride is a magenta-colored dye with a chemical
formula C20H20N3.HCl, which is decolorized by sodium bisulfate
Propanal and Propanone :
These two are distinguished by Schiff's reagent test. Propanal which is
aldehyde gives magenta color with this reagent whereas propanone i.e.
ketone doesn't give. Because this nucleophile is extremely bulky, a ketone,
which is more sterically crowded than an aldehyde at the carbonyl carbon, does not
react with Schiff's reagent, and thus does not produce the
magenta color.
Hence option A is the correct answer.
Schiff's reagent can be used to differentiate between aldehyde and ketones. Fuschsine or rosaniline hydrochloride is a magenta-colored dye with a chemical formula C20H20N3.HCl, which is decolorized by sodium bisulfate
Propanal and Propanone : These two are distinguished by Schiff's reagent test. Propanal which is aldehyde gives magenta color with this reagent whereas propanone i.e. ketone doesn't give. Because this nucleophile is extremely bulky, a ketone, which is more sterically crowded than an aldehyde at the carbonyl carbon, does not react with Schiff's reagent, and thus does not produce the magenta color.
Hence option A is the correct answer.
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