BITSAT 2020
- Exam
- BITSAT
- Year
- 2020
- Subject
- Chemistry
- Chapter
- Biomolecules
BITSAT 2020 · Chemistry · Biomolecules
An organic compound with the formula C_ 6 H_ 12 O_ 6 forms a yellow...
An organic compound with the formula forms a yellow crystalline solid with phenylhydrazine and gives a mixture of sorbitol and mannitol when reduced with sodium. Which among the following could be the compound?
Options
- Afructose
- Bglucose
- Cmannose
- Dsucrose
Correct answer
A. fructose
Step-by-step solution
Since the compound forms a yellow crystalline solid, i.e. osazone with phenylhydrazine, it may be an aldohexose or a ketohexose. Further, since on reduction, compound forms a mixture of sorbitol and mannitol, it must be a ketohexose, i.e. fructose. Recall that glucose on reduction gives only one alcohol glucitol (Sorbitol)