MCQ
Proteins when heated with conc. $HN{O_3}$ give a yellow colour. This is
- AOxidising test
- ✓Xanthoprotic test
- CHoppe's test
- DAcid-base test
✓
Answer
Correct option: B.
Xanthoprotic test
b
(b) Protein + conc. $HN{O_3}$ $\to$ Yellow colour
(b) Protein + conc. $HN{O_3}$ $\to$ Yellow colour
[This test is given by a protein which consists of $\alpha$- amino acids containing a benzene ring such as tyrosine, phenylalanine etc. The yellow colour is due to nitration of benzene ring.]
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