Which one of the following statements is incorrect related to Molecular Orbital Theory?

Question

Accepted Answer

1. **Symmetry of Molecular Orbitals:** According to NCERT, sigma ($$\sigma$$) molecular orbitals are symmetrical around the bond-axis, while pi ($$\pi$$) molecular orbitals are not symmetrical .
2. **Formation of Pi Orbitals:** Molecular orbitals obtained from the linear combination of $$2p_x$$ and $$2p_y$$ orbitals (assuming z-axis is the internuclear axis) are of the $$\pi$$ type. These orbitals consist of positive lobes above and negative lobes below the molecular plane, making them unsymmetrical with respect to rotation around the bond axis .
3. **Analysis of other options:**
   - **Option A:** The $$\pi^*$$ antibonding MO has a node between the nuclei (zero electron density) . (Correct Statement)
   - **Option B:** Bonding MOs are formed by constructive interference where electron waves reinforce each other . (Correct Statement)
   - **Option D:** A $$\pi$$ bonding MO has electron density concentrated above and below the internuclear axis . (Correct Statement)

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