MCQ
The reagent which forms crystalline osazone derivative when reacted with glucose, is
- AFehling solution
- ✓Phenylhydrazine
- CBenedict solution
- DHydroxylamine
✓
Answer
Correct option: B.
Phenylhydrazine
b
$\begin{matrix}
\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CHO\,\,\,\,}}\, \\
\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CHOH}}\, \\
\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{{{(CHOH)}_{3}}}}\, \\
C{{H}_{2}}OH \\
\end{matrix}$ $\underset{\text{Warm}}{\mathop{\xrightarrow{N{{H}_{2}}NH{{C}_{6}}{{H}_{5}}}}}$ $\underset{\text{Glucose phenylhydrazone}\,\,\,\,\,\,}{\mathop{\begin{matrix}
\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,CH=N-NH{{C}_{6}}{{H}_{5}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
CHOH\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix} \\
{{(CHOH)}_{3}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{2}}OH \\
\end{matrix}}}\,$ $\xrightarrow{N{{H}_{2}}NH{{C}_{6}}{{H}_{5}}}$ $\begin{matrix}
\begin{matrix}
\,\,\,\,CH=N-NH{{C}_{6}}{{H}_{5}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C=O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix} \\
{{(CHOH)}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{2}}OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}$ $\xrightarrow{N{{H}_{2}}NH{{C}_{6}}{{H}_{5}}}$ $\begin{matrix}
\begin{matrix}
CH=N-NH{{C}_{6}}{{H}_{5}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
CH=N-NH{{C}_{6}}{{H}_{5}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix} \\
\,\,\,\,\,\,\,\,{{(CHOH)}_{3\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{2}}OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}$ $+\,{{C}_{6}}{{H}_{5}}N{{H}_{2}}\,+\,N{{H}_{3}}$
$\begin{matrix}
\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CHO\,\,\,\,}}\, \\
\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CHOH}}\, \\
\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{{{(CHOH)}_{3}}}}\, \\
C{{H}_{2}}OH \\
\end{matrix}$ $\underset{\text{Warm}}{\mathop{\xrightarrow{N{{H}_{2}}NH{{C}_{6}}{{H}_{5}}}}}$ $\underset{\text{Glucose phenylhydrazone}\,\,\,\,\,\,}{\mathop{\begin{matrix}
\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,CH=N-NH{{C}_{6}}{{H}_{5}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
CHOH\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix} \\
{{(CHOH)}_{3}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{2}}OH \\
\end{matrix}}}\,$ $\xrightarrow{N{{H}_{2}}NH{{C}_{6}}{{H}_{5}}}$ $\begin{matrix}
\begin{matrix}
\,\,\,\,CH=N-NH{{C}_{6}}{{H}_{5}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C=O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix} \\
{{(CHOH)}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{2}}OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}$ $\xrightarrow{N{{H}_{2}}NH{{C}_{6}}{{H}_{5}}}$ $\begin{matrix}
\begin{matrix}
CH=N-NH{{C}_{6}}{{H}_{5}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
CH=N-NH{{C}_{6}}{{H}_{5}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix} \\
\,\,\,\,\,\,\,\,{{(CHOH)}_{3\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{2}}OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}$ $+\,{{C}_{6}}{{H}_{5}}N{{H}_{2}}\,+\,N{{H}_{3}}$
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