Question on: JAMB Chemistry - 2024
When a few drops of Millon reagent is added to egg-white solution in a test tube, the white precipitate changes to
A
orange
B
brick red
C
reddish brown
D
blue
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Correct Option: B
The Millon's test is a chemical test used to detect the presence of proteins. When Millon's reagent (mercury(II) ions in nitric acid) is added to a solution containing protein, a white precipitate forms. Upon heating, or sometimes with time, the precipitate turns brick red. This color change is due to the nitration of tyrosine residues in the protein.
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