Aromatic HydrocarbonsHard
Question
Reaction by which Benzaldehyde cannot be prepared :-
Options
A.
+ Zn/Hg and conc. HCl
+ Zn/Hg and conc. HClB.
+ CrO2Cl2 in CS2 followed by H3O+
+ CrO2Cl2 in CS2 followed by H3O+C.
+ H2 in presence of ( Pd+BaSO4)
+ H2 in presence of ( Pd+BaSO4)D.
+ CO + HCl in presence of anhydrous AlCl3
+ CO + HCl in presence of anhydrous AlCl3 Solution
In presence of Zn - Hg and conc. HCl reduction is useful specially for aldehyde and ketone but carboxylic group remains uneffected






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