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Standard XII
Chemistry
Polymerisation of Alkynes
Trimerisation...
Question
Trimerisation of Ethyne to form Benzene is carried out using:
A
red hot
C
u
tube
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B
mild hot
C
u
tube
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C
red hot
F
e
tube
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D
mild hot
F
e
tube
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Solution
The correct option is
D
red hot
F
e
tube
Red hot
F
e
tube is used in the trimerisation of ethyne to form benzene.
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Q.
Ethyne
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−−−−−
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Q.
When ethyne is passed through a red hot tube, then formation of benzene takes place:
Δ
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∘
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(
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=
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Calculate the standard heat of trimerisation of ethyne to benzene.
3
C
2
H
2
(
g
)
→
C
6
H
6
(
g
)
Q.
When ethyne is passed through a red hot tube, then formation of benzene takes place:
Δ
H
o
f
(
C
2
H
2
)
(
g
)
=
230
k
J
m
o
l
−
1
Δ
H
o
f
(
C
6
H
6
)
(
g
)
=
85
k
J
m
o
l
−
1
Calculate the standard heat of trimerisation of ethyne to benzene.
C
2
H
2
(
g
)
⟶
C
6
H
6
(
g
)
Q.
When ethyne is passed through a red hot tube, then formation of benzene takes place:
Δ
H
∘
f
(
C
2
H
2
)
(
g
)
=
230
k
J
m
o
l
−
1
H
∘
f
(
C
6
H
6
)
(
g
)
=
85
k
J
m
o
l
−
1
Calculate the standard heat of trimerisation of ethyne to benzene.
3
C
2
H
2
(
g
)
→
C
6
H
6
(
g
)
Q.
When ethyne is passed through a red hot tube, is formed
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