A SIGMA bond differs from a PI bond in that the sigma bond:
AForms by sideways overlap of p orbitals only
BForms by head-on overlap; is stronger than pi
CAlways involves d orbitals in the formation
DCannot exist between same kind of atoms
Answer & Solution
Correct answer: B. Forms by head-on overlap; is stronger than pi
SIGMA (σ): head-on axial overlap; strong; first bond between atoms. PI (π): sideways p-orbital overlap; weaker; only in addition to sigma (in double/triple bonds). C=C has 1σ + 1π.
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