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Byju's Answer
Standard X
Chemistry
Sigma and Pi Bonds
is sigma bond...
Question
is sigma bond possible if 1s and 2s orbital overlapped?
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Q.
Considering
x
−
axis as the internuclear axis, the overlap of which of the following orbitals will not form a sigma bond and why?
(a)
1
s
and
2
s
(b)
1
s
and
2
p
x
(c)
2
p
y
and
2
p
y
(d)
1
s
and
2
s
Q.
How many sigma and pi bonds will form when one s-orbital undergo head-on overlapping with one p-orbital?
Q.
The relative energies of molecular orbitals are found to be in increasing order as follows-
σ
(
1
s
)
<
σ
∗
(
1
s
)
<
σ
(
2
s
)
<
σ
∗
(
2
s
)
<
[
π
(
2
p
y
)
π
(
2
p
z
)
]
<
σ
(
2
p
x
)
<
[
π
∗
(
2
p
y
)
π
∗
(
2
p
z
)
]
<
σ
∗
(
2
p
x
)
Q.
How many orbitals are having higher energy compared to
σ
2
S
for
L
i
2
molecule from the molecular orbitals given below.
σ
∗
1
s
,
σ
∗
2
s
,
σ
1
s
,
π
2
p
y
,
π
∗
2
p
x
,
π
∗
2
p
z
,
π
2
p
z
Q.
When
2
s
−
2
s
,
2
p
−
2
p
and
2
p
−
2
s
orbitals overlap, the bond strength decreases in the order:
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