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VITEEE 2011 Paper
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Section:
Chemistry
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© examsnet.com
Question : 48
Total: 120
C
H
3
C
H
2
B
r
undergoes Wurtz reaction. We may expect some of the following product
A :
C
H
3
C
H
2
C
H
2
C
H
3
B :
C
H
2
=
C
H
2
C :
C
H
3
−
C
H
3
Select correct product
Only A
A and B
A, B and C
A and C
Validate
Solution:
C
2
H
5
B
r
+
N
a
.
→
C
H
3
C
H
2
.
+ NaBr
Intermediate free radical
C
H
3
C
H
2
.
combines to form
C
H
3
C
H
2
-
C
H
2
C
H
3
(as a main product) and also
C
H
2
= =
C
H
2
and
C
H
3
C
H
3
by disproportion
C
H
3
C
H
2
.
+
C
H
3
C
H
2
.
→
C
H
3
C
H
2
-
C
H
2
C
H
3
n - butane :
C
H
3
C
H
2
.
+
C
H
3
C
H
2
.
→
C
H
2
=
C
H
2
+
C
H
3
-
C
H
3
(disproportion reaction)
© examsnet.com
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