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Byju's Answer
Standard XII
Chemistry
Preparation of Carboxylic Acids
Identify C in...
Question
Identify C in the following series
C
3
H
7
I
K
O
H
−
−−
→
a
l
c
.
A
N
B
S
−
−−
→
Δ
B
K
C
N
−
−−
→
a
l
c
.
C
A
(
C
H
3
)
2
C
H
−
C
N
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B
C
H
2
=
C
H
−
C
H
2
C
N
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C
B
r
−
C
H
=
C
H
−
C
N
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D
C
H
2
=
C
H
−
C
|
B
r
H
C
N
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Solution
The correct option is
B
C
H
2
=
C
H
−
C
H
2
C
N
In this reaction
1
s
t
step is elimination reaction followed by allylic bromination by NBS and further it react with alc
K
C
N
to give final product.
Option B is correct.
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Similar questions
Q.
B
r
−
C
H
=
C
H
−
C
H
2
−
C
H
=
C
H
−
C
H
2
−
C
H
=
C
=
C
=
C
H
−
C
H
=
C
(
C
H
3
)
2
Total number of geometrical isomers for the given compound is:
Q.
In the following compound, the number of sp hybridised carbons are:
C
H
2
=
C
=
C
H
−
C
H
−
C
≡
C
H
|
C
N
Q.
Find out the order of stability between the species given below.
C
H
3
−
C
|
C
N
H
−
+
C
H
−
C
H
3
and
C
|
C
N
H
2
−
C
H
2
−
+
C
H
−
C
H
3
Q.
Select the member of each pair that shows faster rate of
S
N
2
reaction with
K
I
in acetone.
(a)
C
H
3
−
C
H
2
−
C
H
2
−
C
H
2
−
C
l
a
n
d
C
H
3
−
C
H
∣
C
H
3
−
C
H
2
−
C
l
(
I
)
(
I
I
)
(b)
C
H
3
−
C
H
2
−
C
H
2
−
C
l
a
n
d
C
H
3
−
C
H
2
−
C
H
2
−
B
r
(
I
)
(
I
I
)
(c)
C
H
3
−
C
H
∣
C
H
3
−
C
H
2
−
C
H
2
−
C
l
a
n
d
C
H
3
−
C
H
3
∣
C
∣
C
H
3
−
C
H
2
C
l
(
I
)
(
I
I
)
(d)
C
H
3
−
C
H
2
−
C
H
2
−
B
r
∣
C
H
−
C
H
3
a
n
d
C
H
3
−
C
H
3
∣
C
H
−
C
H
2
−
B
r
∣
C
H
−
C
H
3
(
I
)
(
I
I
)
Q.
A)
C
H
3
−
C
H
2
−
⊕
C
H
2
B)
C
H
3
−
C
H
|
F
−
⊕
C
H
2
C)
C
H
3
−
C
H
|
B
r
−
⊕
C
H
2
D)
C
H
3
−
C
H
|
C
l
−
⊕
C
H
2
Arrange the following carbocations in decreasing order of their stability:
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