Question

Glucose forms many derivatives. The derivative which will help to prove the furanose structure is

• A. Acetyl
• B. Benzoyl
• C. Osazone
• D. Isopropylidene

Answer 1

The correct option is C Osazone

$\text{Glucose and fructose differ in the arrangement of atoms around the C−1 and C−2 carbon.}$ When both of them react with three molecules of phenylhydrazine, the formation of $\text{osazone crystals makes the difference between}$ $\text{the carbon atoms in their chain}$ and hence, in such way it helps to prove the fructose structure.