MHT CET2009ChemistryBiomolecules
White precipitate is formed in
Options
- AMillon's test
- Bninhydrin test
- Cbiuret test
- Dxanthoprotic test
Correct answer
A. Millon's test
Step-by-step solution
In Millon's test, first the compound (to be tested) ie, protein is nitrated by HNO ₃ and then complexed with Hg ( I ) and Hg ( II ) ions. A red precipitate is obtained. However, if the protein contains tyrosine, sometimes initially a white precipitate is formed that turns red on heating.