2-3ml of pyrogallol solution is added to formaldehyde and shaken. To the mixture, 4-5 drops of concentrated HCl is added and heated. What is observed?
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Amino acids react after addition of formaldehyde ... Reagents: powdered magnesium, dilute HCl, conc. H2 S04 ... (on the tip of a knife) of chromotropic acid is then added to the mixture,.
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