Biomolecules Question 178
Question: An organic compound with the formula $ C_6H _{12}O_6 $ 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:
A) fructose
B) glucose
C) mannose
D) sucrose
Show Answer
Answer:
Correct Answer: A
Solution:
[a] 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)
BETA
