Question

You have taken food S in a test tube. Added Y in it. The colour of solution turns orange. Identify X and Y​

Answer 1

Answer:

Protein with benzene ring.

HNO3 follow3d byNaOH

Xanthoproteic test

• Add carefully 1mL of concentrated HNO3

to 2mL of protein

solution (albumin of egg, milk or gram seed extract).

• A white precipitate is formed.

• Boil the solution and the colour changes to yellow.

• Cool the test tube and add 2mL of 20% NaOH (or ammonia

solution) to make it alkaline.

• The colour changes to orange indicating the presence of proteins.