A) Refluxing with water
B) Refluxing with strong acids
C) Refluxing with soda amalgam and water
D) Refluxing with zinc amalgam and concentrated HCl
E) Passing the vapour under heated \[Pb{{O}_{2}}\]
Correct Answer: D
Solution :
\[RCHO+4H\xrightarrow{Zn-Hg/HCl}R-C{{H}_{3}}+{{H}_{2}}O\] \[\begin{matrix} R \\ R \\ \end{matrix}>C=O+4H\xrightarrow{Zn-Hg/HCl}\begin{matrix} R \\ R \\ \end{matrix}>C{{H}_{2}}+{{H}_{2}}O\]
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