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What is a Schiff's reagent ? How is it used to detect aldehydes ? |
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Answer» Solution :(1) Schiff's reagent is prepared by dissolving pink p-rosaniline hydrochloride (dye Fuchsin) in WATER and passing ` SO_(2)`GAS TILL the pink solution is decolourised. (2) Schiff's reagent is an oxidising agent. (3) When an aldehyde is added to Schiff's reagent. The colourless solution turns pink or in magenta colour and aldehyde is oxidised to a carboxylic acid. (4) This test is not given by KETONES, HENCE, used to distinguish between aldehyde and ketone. |
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