Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main2016ChemistryBiomoleculesActual

Observation of "Rhumann's purple" is a confirmatory test for the presence of:

Options

  1. AStarch
  2. BReducing sugar
  3. CProtein
  4. DCupric ion

Correct answer

C. Protein

Step-by-step solution

Observation of "Rhumann's purple" is a confirmatory test for the presence of proteins. Rhumann's purple is ninhydrin. When the proteins reacts with Rhumann's purple then violet precipitates are formed. This confirms the presence of proteins in the compounds. The reaction is given below.

Practice Biomolecules on Quantrex Academy →

More from Biomolecules

A known artificial sweetener X is composed of 4-chloro-4-deoxy- -D-galactose and 1,6-dichloro-1,6-dideoxy- -D-fructose joined by a glycosidic linkage. Structure of D-galactose is g 2026The correct statement(s) regarding sugars is(are) Given: Specific rotations of L-( - )-glucose and L-( + )-fructose are -52.5^ and +92.5^ , respectively. 2026In the following reaction sequence, major products X and Y are acyclic monomers. 500 mol of X completely reacts with 500 mol of Y to give 1 mol of a single biodegradable acyclic co 2026The incorrect statement from the following with respect to carbohydrates is: 2026Which of the following amino acid will give violet coloured complex with neutral ferric chloride solution? 2026Consider the following reactions. Total number of electrons in the bonds and lone pair of electrons in the product (X) is : 2026Match the List-I with List-II List-I Deficiency Disease List-II Vitamin A. Scurvy I. Pyridoxine B. Convulsions II. Vitamin A C. Cheilosis III. Ascorbic Acid D. Xerophthalmia IV. Ri 2026Match the List-I with List-II List-I Amino acid List-II Positive reaction/Test for functional group present in side chain of amino acid A. Glutamine I. Hinsberg's test B. Lysine II 2026 Full Biomolecules list All JEE Main PYQs