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Byju's Answer
Standard XII
Chemistry
Hyperconjugation
Which of the ...
Question
Which of the following gives most stable carbocation on dehydration?
A
C
H
3
C
H
2
C
H
2
C
H
2
O
H
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B
C
H
3
−
C
H
−
C
H
2
−
O
H
|
C
H
3
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C
C
H
3
|
C
H
3
−
C
−
O
H
|
C
H
3
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D
C
H
3
|
C
H
3
−
C
−
C
H
2
−
C
H
2
−
O
H
|
C
H
3
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Solution
The correct option is
C
C
H
3
|
C
H
3
−
C
−
O
H
|
C
H
3
Tertiary alcohol will give stable tertiary carbocation.
Suggest Corrections
9
Similar questions
Q.
(A)
C
H
3
−
C
|
C
H
3
H
−
C
H
2
−
C
H
2
−
O
H
(B)
C
H
3
−
O
H
|
C
|
C
H
3
−
C
H
2
−
C
H
3
(C)
C
H
3
C
H
3
|
C
H
−
O
H
|
C
H
−
C
H
3
The order of given alkanols
A
,
B
,
C
in their reactivity towards acid catalysed dehydration is:
Q.
Which of the following reaction is example of
S
N
2
reaction using
c
o
n
c
.
H
C
l
:
(
a
)
C
H
3
−
C
H
2
−
O
H
A
n
h
y
Z
n
C
l
2
/
△
−
−−−−−−−−
→
C
H
3
−
C
H
2
−
C
l
(
b
)
C
H
3
−
C
H
3
|
C
|
C
H
3
−
C
H
2
O
H
A
n
h
y
Z
n
C
l
2
/
△
−
−−−−−−−−
→
C
H
3
−
C
H
1
|
C
|
C
H
3
−
C
H
2
−
C
H
3
(
c
)
C
H
3
−
O
H
|
C
|
C
H
3
−
C
H
3
A
n
h
y
Z
n
C
l
2
/
△
−
−−−−−−−−
→
C
H
3
−
C
l
|
C
|
C
H
3
−
C
H
3
(
d
)
C
H
2
=
C
H
−
C
H
2
−
O
H
A
n
h
y
Z
n
C
l
2
/
△
−
−−−−−−−−
→
C
H
2
=
C
H
−
C
H
2
−
C
l
Q.
C
H
3
−
O
H
|
C
H
−
C
H
2
−
C
H
3
A
l
2
O
3
−
−−
→
573
K
C
H
3
−
C
H
=
C
H
−
C
H
3
Butane-2-ol But-2-ene
Q.
Assertion :
C
H
3
C
H
3
|
|
C
H
3
−
C
−
C
H
2
−
B
r
+
N
a
O
H
⟶
C
H
3
−
C
−
C
H
2
−
C
H
3
|
|
C
H
3
O
H
Reason: It follows with formation of more stable carbocation.
Q.
In the reaction given below, the product would be :
C
H
3
−
C
H
=
C
H
−
C
H
3
H
3
O
+
−
−−
→
C
H
3
−
C
H
2
−
O
H
|
C
H
−
C
H
3
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