Xanthoproteic test is the reaction of nitric acid with:

Vitamins

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Aromatic amino acids

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Enzymes

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Fats

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Solution

The correct option is B Aromatic amino acids
Nitric acid reacts with aromatic amino acids to form yellow nitrated products which is known as the xanthoproteic reaction. This test is carried out by adding concentrated nitric acid to the substance being tested, and then heating the mixture.
Hence, correct option is (b).

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[CPMT 1989]

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