1.

Preteins when heated with conc. NHO_3 give a yellow colour. This is

Answer»

OXIDISING test
xanthoprotic test
HOPPE's test
acid-base test

Solution :Xanthoprotic test is given by a protein which consists of `alpha`-amino acid CONTAINING a benzene ring such as tyrosine, PHENYL alanine etc. This yellow colour is due to NITRATION of benzene ring.
Protein + conc. `HNO_3 to ` Yellow Colour


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