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Byju's Answer
Standard XII
Chemistry
Electromeric Effect
In the follow...
Question
In the following sequence of reactions,
C
H
3
C
H
2
B
r
K
O
H
(
a
l
c
)
−
−−−−−−−
→
X
B
r
2
−
−
→
Y
K
O
H
(
a
l
c
)
−
−−−−−−−
→
Z
,
Z
i
s
A
C
H
2
=
C
H
2
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B
C
H
2
B
r
C
H
2
B
r
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C
C
H
≡
C
H
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D
C
H
3
≡
C
H
3
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Solution
The correct option is
B
C
H
≡
C
H
The
K
O
H
(
a
l
c
.
)
has the tendency to remove
H
−
B
r
from the molecule while
B
r
2
adds
B
r
+
and
B
r
−
to the molecule.
Therefore,
(
Z
)
is
C
H
≡
C
H
Suggest Corrections
0
Similar questions
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:
Q.
Which would undergo
S
N
1
reactions faster in the following pair?
C
H
3
−
C
H
2
−
C
H
2
−
B
r
and
C
H
3
−
C
H
−
C
H
3
|
B
r
Q.
The decreasing order of rate of
S
N
2
is :
(I)
B
r
−
C
H
2
−
C
H
2
−
B
r
(II)
N
=
C
−
C
H
2
−
B
r
(III)
C
H
3
−
C
|
B
r
H
−
C
H
3
(IV)
C
H
3
−
C
H
2
−
B
r
Q.
Give the IUPAC name of the following compound:
C
H
3
−
C
H
2
−
C
H
3
|
C
H
−
C
H
2
−
C
H
2
−
C
H
2
−
C
H
2
−
C
H
2
−
C
H
2
−
C
H
2
−
C
H
2
−
C
H
3
|
C
H
−
C
H
3
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