MCQ
Reaction by which benzaldehyde cannot be prepared
- A(image) $+ CO + HCl$ in presence of anhydrous $AlCl_3$
- ✓(image)$+ Zn/Hg$ and conc. $HCl$
- C(image) $+ CrO_2Cl_2$ in $Cs_2$ followed by $H_3O^+$
- D(image) $+ H_2$ in presence of $Pd-BaSO_4$
✓
Answer
Correct option: B.
(image)$+ Zn/Hg$ and conc. $HCl$
b
In presence of $\mathrm{Zn}-\mathrm{Hg}$ and conc. $HCl$ reduction is useful specially for aldehyde and ketone but carboxylic group remains uneffected
In presence of $\mathrm{Zn}-\mathrm{Hg}$ and conc. $HCl$ reduction is useful specially for aldehyde and ketone but carboxylic group remains uneffected
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