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Per NCERT §4.7.1, when two atomic orbitals ψ_A and ψ_B combine by LCAO, what two molecular orbitals form, and what energies do they have?
AOne π and one δ
BBoth higher than atomic orbitals
CBoth equally energetic
Dσ = ψ_A + ψ_B (BONDING, lower energy) and σ* = ψ_A − ψ_B (ANTIBONDING, higher energy)
Answer & Solution
Correct answer: D. σ = ψ_A + ψ_B (BONDING, lower energy) and σ* = ψ_A − ψ_B (ANTIBONDING, higher energy)
Per NCERT §4.7.1, LCAO addition → bonding MO (lower E, constructive interference); subtraction → antibonding MO (higher E, nodal plane).
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