Q. 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 ?
Biomolecules
Solution:
As $C_6H_{12}O_6$ forms a crystalline osazone with phenylhydrazine, it must be an aldohexose or ketohexose. As the compound on reduction with Na gives sorbitol and mannitol, the given compound is fructose.
