Chemistry - Biomolecules Question with Solution | TestHub
Observe these compound and give answer of following questions.
In the given Aldose which can form same osazone
(I) D–glucose (II) D–gulose
(III) D–mannose (IV) D–galatose
Options:
Answer:
Solution:
Question Explanation:
The question asks to identify which aldoses form the same osazone .
Concept:
This question is based on osazone formation , epimerism , and aldose chemistry .
Solution:
Osazone formation occurs when a sugar reacts with phenylhydrazine . In this reaction, only the aldehyde group at C-1 and the adjacent hydroxyl group at C-2 participate. Therefore, sugars that differ only in configuration at C-2 (C-2 epimers) form the same osazone .
Hence, D-glucose and D-mannose , being C-2 epimers, form the same osazone.
Other sugars like D-gulose or D-galactose differ at other carbons → give different osazones.