Question
Question: The reagent which forms crystalline osazone derivative when reacted with glucose, is...
The reagent which forms crystalline osazone derivative when reacted with glucose, is
A
Fehling solution
B
Phenylhydrazine
C
Benedict solution
D
Hydroxylamine
Answer
Phenylhydrazine
Explanation
Solution
\underset{|}{CHO} \\
\underset{|}{CHOH} \\
\underset{|}{(CHOH)_{3}} \\
CH_{2}OH
\end{matrix}\underset{\text{Warm}}{\overset{\quad NH_{2}NHC_{6}H_{5}\quad}{\rightarrow}}\underset{\text{Glucose phenylhydrazone}}{\begin{matrix}
\underset{|}{CH = N - NHC_{6}H_{5}} \\
\underset{|}{CHOH} \\
\underset{|}{(CHOH)_{3}} \\
CH_{2}OH
\end{matrix}}$$
$\overset{\quad NH_{2}NHC_{6}H_{5}\quad}{\rightarrow}\begin{matrix}
\underset{|}{CH} = N - NHC_{6}H_{5} \\
C = N - NHC_{6}H_{5} \\
\overset{|}{(CHOH)_{3}} \\
\underset{\text{Glucosazone}}{\overset{|}{CH_{2}OH}}
\end{matrix} + C_{6}H_{5}NH_{2} + NH_{3}$