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AP EAMCET Engineering 22 Apr 2019 Shift 1 Paper
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© examsnet.com
Question : 137
Total: 160
Wurtz reaction of bromoethane gives n-butane. Sodium salt of X on heating with sodalime also results in n-butane. Compound X is
C
H
3
C
H
2
C
H
2
C
O
O
H
C
H
3
(
C
H
2
)
3
C
O
O
H
C
H
3
(
C
H
2
)
4
C
O
O
H
C
H
3
C
H
2
C
O
O
H
Validate
Solution:
The Wurtz reaction is shown below.
C
H
3
C
H
2
B
r
+
2
N
a
+
B
r
C
H
2
C
H
3
2
N
A
B
r
–
–
–
–
–
–
–
–
🢖
C
H
3
C
H
2
C
H
2
C
H
3
When sodium salt of pentanoic acid (X) reacts with sodalime and heated, it forms n-butane as shown below.
C
H
3
(
C
H
2
)
3
C
O
O
H
(
X
)
N
a
O
H
–
–
–
–
–
–
–
–
🢖
C
H
3
C
H
2
C
H
2
C
H
2
C
O
O
N
a
N
a
O
H
+
C
a
O
(
Sodalime
)
–
–
–
–
–
–
–
–
–
–
–
–
–
–
🢖
C
H
3
C
H
2
C
H
2
C
H
3
+
N
a
2
C
O
3
Therefore,
X
is
C
H
3
(
C
H
2
)
3
C
O
O
H
© examsnet.com
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