1. Tardigrade
  2. Question
  3. Chemistry
  4. A, B and C are three biomolecules. The results of the tests performed on them are given below: Molisch's lest Barfoed Test Biuret Test A Positive Negative Negativde B Positive Positive Negative C Negative Negative Positive A, B and C are respectively :

Q. A, B and C are three biomolecules. The results of the tests performed on them are given below :
Molisch's lest Barfoed Test Biuret Test
A Positive Negative Negativde
B Positive Positive Negative
C Negative Negative Positive

A, B and C are respectively :

 2287  217 JEE MainJEE Main 2020Aldehydes Ketones and Carboxylic Acids Report Error

Solution:

Alanine does not show Biuret test because Biuret test is used for deduction of peptide linkage & alanine is amino acid. Albumine is protein so have paptide linkage so it gives positive Biuret test. Positive Barfoed test is shown by monosaccharide but not disaccharide. Positive Molisch's test is shown by glucose.