Which of the following gives a positive test with ninhydrin? [2024]
Egg albumin
Starch
Polyvinyl chloride
Cellulose
(A)
The ninhydrin test is a chemical test which is used to check the presence of amines or -amino acids in a given compound. In this test, ninhydrin (2, 2-dihydroxyindane-1, 3-dione) is added to a test solution of the analyte. The development of a deep blue color indicates the presence of ammonia, primary/secondary amines, or amino acids in the analyte.
