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Byju's Answer
Standard XII
Chemistry
Elimination Reactions of Alkyl Halides
Be-CH2-CH2-Br...
Question
B
e
−
C
H
2
−
C
H
2
−
B
r
→
H
−
C
≡
C
−
H
The reagents for the following conversion, is/are :
A
Alcoholic
K
O
H
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B
Alcoholic
K
O
H
followed by
N
a
N
H
2
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C
Aqueous
K
O
H
followed by
N
a
N
H
2
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D
Z
n
/
C
H
3
O
H
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Solution
The correct option is
C
Alcoholic
K
O
H
followed by
N
a
N
H
2
1,2 dihalides when reacts with alc.
K
O
H
and
N
a
N
H
2
it forms corresponding alkynes.
Hence, option B is correct.
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Similar questions
Q.
Arrange the following alkyl halides in decreasing order of the rate of
β
-elimination reaction with alcoholic
K
O
H
.
(I)
C
H
3
−
H
|
C
|
C
H
3
−
C
H
2
B
r
(II)
C
H
3
−
C
H
2
−
B
r
(III)
C
H
3
−
C
H
2
−
C
H
2
−
B
r
Q.
The correct decreasing order of following alkyl halides according to the rate of
β
- elimination reaction with alcoholic KOH will be:
(i)
C
H
3
−
H
|
C
|
C
H
3
−
C
H
2
B
r
(ii)
C
H
3
−
C
H
2
−
B
r
(iii)
C
H
3
−
C
H
2
−
C
H
2
−
B
r
Q.
Which of the following compounds undergoes dehydrochlorination most easily when treated with alcoholic
K
O
H
?
Q.
The correct decreasing order of stability of alkene formed from the following alkyl halides according to the
β
−
elimination reaction with alcoholic KOH will be:
(i)
(ii)
C
H
3
−
C
H
2
−
B
r
(iii)
C
H
3
−
C
H
2
−
C
H
2
−
B
r
Q.
Consider the following transformations.
H
−
C
≡
C
−
C
H
2
−
C
H
2
−
C
H
3
→
H
3
C
−
C
H
=
C
H
−
C
H
2
−
C
H
3
Which reaction sequence will bring about the above transformation?
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