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Conditions for atomic orbitals to combine into molecular orbitals (LCAO)

This type of question, asked 2 times: 31 Jan 2024, 24 Jan 2025. All 2 questions below, oldest first.

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  1. Question 1

    31 Jan 2024

    47
    The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals (A) have the same energy (B) have the minimum overlap (C) have same symmetry about the molecular axis (D) have different symmetry about the molecular axis Choose the most appropriate from the options given below:

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  2. Question 2

    24 Jan 2025

    30
    Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z-direction] ? (A) 2pz2p_{z} and 2px2p_{x} (B) 2 s and 2px2p_{x} (C) 3dxy3d_{xy} and 3dx2−y23d_{x^{2}-y^{2}} (D) 2 s and 2pz2p_{z} (E) 2pz2p_{z} and 3dx2−y23d_{x^{2}-y^{2}}

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