COMEDK2023ChemistryBiomolecules
Which of the following hexoses will form the same osazone when treated with excess phenyl hydrazine?
Options
- AD-glucose, D-fructose and D-galactose
- BD-glucose, D-fructose and D-mannose
- CD-glucose, D-mannose and D-galactose
- DD-fructose, D-mannose and D-galactose
Correct answer
B. D-glucose, D-fructose and D-mannose
Step-by-step solution
D-glucose, D-fructose and D-mannose form the same osazone treated with excess phenyl hydrazine because they differ only Ist and 2 nd carbon atoms which are transformed to the same form. They form same osazone