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AIPMT 2013 Physics and Chemistry Paper
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Question : 72
Total: 90
Reaction by which Benzaldehyde cannot be prepared :-
+
Zn
/
Hg
and conc.
HCl
+
CrO
2
Cl
2
in
CS
2
followed by
H
3
O
⊕
+
H
2
in presence of
Pd
+
BaSO
4
+
CO
+
HCl
in presence of anhydrous
A
l
C
l
3
Validate
Solution:
In presence of
Zn
−
Hg
and conc.
HCl
reduction is useful specially for aldehyde and ketone but carboxylic group remains unaffected
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