Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 201910 JanuaryEvening Shift
Exam
JEE Main
Year
2019
Date
10 January
Shift
Evening Shift
Subject
Chemistry
Chapter
Biomolecules

JEE Main 2019 · 10 January · Evening Shift · Chemistry · Biomolecules

Which of the following tests cannot be used for identifying amino...

Which of the following tests cannot be used for identifying amino acids?

Options

  1. ABiuret test
  2. BXanthoproteic test
  3. CBarfoed test
  4. DNinhydrin test

Correct answer

C. Barfoed test

Step-by-step solution

Barfoed’s test is used for distinguishing monosaccharides from reducing disaccharides. Monosaccharides usually react in about 1−21 - 2 minute while the reducing disaccharides take much longer time between 7−127 - 12 minutes to react with the reagent. Brick red color is obtained in this test which is due to formation of cuprous oxide

Barfoed's test is basically used for detecting the presence of monosaccharides.

Practice Biomolecules on Quantrex Academy →

More from Biomolecules

A known artificial sweetener X is composed of 4-chloro-4-deoxy- α -D-galactose and… JEE Advanced 2026The correct statement(s) regarding sugars is(are) Given: Specific rotations of L-(… JEE Advanced 2026In the following reaction sequence, major products X and Y are acyclic monomers. 500 mol… JEE Advanced 2026The incorrect statement from the following with respect to carbohydrates is: JEE Main 2026Which of the following amino acid will give violet coloured complex with neutral ferric… JEE Main 2026Consider the following reactions. Total number of electrons in the π bonds and lone pair… JEE Main 2026Match the LIST-I with LIST-II List-I Deficiency Disease List-II Vitamin A. Scurvy I.… JEE Main 2026Match the LIST-I with LIST-II List-I Amino acid List-II Positive reaction/Test for… JEE Main 2026 Full Biomolecules list All JEE Main PYQs