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Byju's Answer
Standard XII
Chemistry
Addition Reactions
4 - octyne Pr...
Question
4
−
o
c
t
y
n
e
H
2
(
P
d
−
B
a
S
O
4
)
−
−−−−−−−−−
→
Product (P).
P is:
A
trans 4-octene
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B
cis-4-octene
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C
n-octane
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D
isooctane
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Solution
The correct option is
A
cis-4-octene
When 4-octyne is hydrogenated in presence of
P
d
−
B
a
S
O
4
, cis-4-octene is obtained.
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Similar questions
Q.
Assertion :Addition of 1.0 equivalent of
H
2
to 4-octyne gives
t
r
a
n
s
-4-octene as major product Reason: A cyclic bromonium ion intermediate is formed
Q.
The reduction of 4-octyne with
H
2
in the presence of
P
d
/
B
a
S
O
4
and quinoline gives:
Q.
The reduction of 4-octyne with
H
2
in the presence of
P
d
/
B
a
S
O
4
and quinoline gives
:
Q.
C
H
3
−
C
H
2
−
C
≡
C
−
C
H
2
−
C
H
3
N
a
i
n
−
−−−
→
L
i
q
N
H
3
Product (P).
P is:
Q.
I
n
o
r
d
e
r
t
o
c
o
m
p
l
e
t
e
t
h
e
r
e
a
c
t
i
o
n
1
−
P
e
n
t
y
n
e
a
→
4
−
O
c
t
a
n
e
b
→
c
i
s
−
4
−
O
c
t
a
n
e
a
a
n
d
b
w
i
l
l
b
e
(
1
)
N
a
N
H
2
;
a
C
H
3
C
H
2
B
r
:
H
2
b
(
o
n
e
m
o
l
e
)
P
d
o
r
N
i
(
2
)
N
a
N
H
2
;
C
H
3
C
H
2
C
H
2
B
r
:
H
2
(
t
w
o
m
o
l
e
s
)
P
d
o
r
N
i
(
3
)
N
a
N
H
2
;
C
H
3
C
H
2
C
H
2
B
r
:
H
2
,
(
o
n
e
−
m
o
l
e
)
P
d
o
r
N
i
(
4
)
N
a
N
H
2
;
C
H
3
C
H
2
C
H
2
B
r
:
B
H
3
,
H
2
O
2
,
O
H
−
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