MCQ
Which is used to differentiate between aldehyde and ketone :
- A$\text{NaHCO} _3$
- B$\text{HCN}$
- ✓Fehling solution
- DAll of these
✓
Answer
Correct option: C.
Fehling solution
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$(i)\,\,\begin{matrix}
CHO\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
{{(CH-OH)}_{3}}\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\,\,C{{H}_{2}}-OH\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}\xrightarrow{4HI{{O}_{4}}} Product$ $(ii)\,\,\begin{matrix}
C{{H}_{2}}OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
{{(CH-OH)}_{4}}\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\,\,C{{H}_{2}}-OH\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}\xrightarrow{5HI{{O}_{4}}} Product$
→CHO\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
{{(CH-OH)}_{3}}\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\,\,C{{H}_{2}}-OH\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}\xrightarrow{4HI{{O}_{4}}} Product$ $(ii)\,\,\begin{matrix}
C{{H}_{2}}OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
{{(CH-OH)}_{4}}\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\,\,C{{H}_{2}}-OH\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}\xrightarrow{5HI{{O}_{4}}} Product$
Ratio of moles of formic acid obtained in reaction $(i)$ and reaction $(ii)$ is
The mole fraction of the solute in one molal aqueous solution is
Identify product $C$ in above reaction sequence
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