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Question
Chemistry
Which of the following reagents can be used to prepare benzaldehyde from toluene?
Q. Which of the following reagents can be used to prepare benzaldehyde from toluene?
1573
204
CMC Medical
CMC Medical 2007
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A
C
r
O
3
in
(
C
H
3
CO
)
2
O
B
K
2
C
r
2
O
7
+ cone.
H
2
S
O
4
C
Hot alkaline
K
M
n
O
4
D
Conc.
H
N
O
3
Solution:
k
2
C
r
2
O
7
+
co
n
c
.
H
2
S
O
4
,
hot alkaline
K
M
n
O
4
and cone.
H
N
O
3
will all oxidise toluene to benzoic acid while
C
r
O
3
in
(
C
H
3
CO
)
2
O
will oxidise toluene to only benzaldehyde.