PG entrance exam CUET PG 2025 Mock Test Chemical Sciences Basic Principles of Quantum Mechanics

The following plots schematically show the variation of two molecular orbitals ψ1 and ψ2 along the internuclear axis of a linear triatomic molecule A2B.

If the atomic orbitals corresponding to atoms A and B are, respectively, ϕA and ϕB, the molecular orbitals ψ1 and ψ2 have the form (all the coefficients are positive)

1
ψ1 = a1ϕA + b1ϕB + c1ϕA
ψ2 = a2ϕA − b2ϕB − c2ϕA
2
ψ1 = a1ϕA + b1ϕB + a1ϕA
ψ2 = a2ϕA − b2ϕB + a2ϕA
3
ψ1 = a1ϕA + b1ϕB + c1ϕA
ψ2 = a2ϕA − b2ϕB + c2ϕA
4
ψ1 = a1ϕA + b1ϕB + a1ϕA
ψ2 = a2ϕA − b2ϕB − a2ϕA
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