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Standard XII
Chemistry
Features of MOT
According to ...
Question
According to Molecular orbital theory which of the following is correct?
A
L
U
M
O
level for
C
2
molecule is
σ
2
p
x
orbital
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B
In
C
2
molecules, both the bonds are
π
bonds
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C
In
C
2
−
2
ion, there is one
σ
and two
π
bonds
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D
All the above are correct
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Solution
The correct option is
A
L
U
M
O
level for
C
2
molecule is
σ
2
p
x
orbital
C
2
molecule has
12
electrons. Its molecular orbital diagram is:
(
σ
1
s
)
2
(
σ
∗
1
s
)
2
(
σ
2
s
)
2
(
σ
∗
2
s
)
2
(
Π
2
p
x
)
2
(
σ
2
p
x
)
(
Π
2
p
4
)
2
Here LUMO is the least unoccupied molecular orbital. For
C
2
, LUMO is
σ
2
p
x
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Q.
According to molecular orbital theory,
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Find the sum of bond order and the number of
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