Which of the following gives a positive test with ninhydrin?JEE Main 2024 (05 Apr Shift 1)AStarchBEgg albuminCPolyvinyl chlorideDCellulose

Ninhydrin is a chemical reagent used to detect ammonia or primary and secondary amines. When it reacts with these substances, it forms a deep blue or purple color.

A. Starch - Starch is a polysaccharide and does not contain any amino group. So, it will not give a positive test with ninhydrin.

B. Egg albumin - Albumin is a protein, and proteins are made up of amino acids. Since amino acids have both primary amine and carboxyl groups, they will react with ninhydrin and give a positive test.

C. Polyvinyl chloride - Polyvinyl chloride is a type of plastic and does not contain any amino group. So, it will not give a positive test with ninhydrin.

D. Cellulose - Cellulose is a polysaccharide and does not contain any amino group. So, it will not give a positive test with ninhydrin.

So, the answer is BEgg albumin.