Considering x-axis as the internuclear axis, which out of the following will not form a sigma bond?
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a
1s and 1s
b
1s and 2px
c
2py and 2py
d
ls and 2s
answer is C.
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Detailed Solution
Will not form a σ-bond. Because on taking x-axis as the internuclear axis, 2py and 2py orbitals overlap sideway (lateral overlapping) resulting in the formation of a π-bond.