MDCAT Chemistry MCQ #1734

Molecular Orbital Theory explains the paramagnetic behavior of Oxygen (O2). This property is attributed to the presence of:

MDCAT Chemistry MCQ #1734

  1. Question 1

    Q1. Molecular Orbital Theory explains the paramagnetic behavior of Oxygen (O2). This property is attributed to the presence of:

    • A) Two unpaired electrons in antibonding orbitals
    • B) One unpaired electron in a bonding orbital
    • C) Completely filled molecular orbitals
    • D) Delocalized electrons across the molecule

    Answer: Two unpaired electrons in antibonding orbitals

    Explanation: MOT predicts two unpaired electrons in pi-star antibonding orbitals. Option C fails as it describes a diamagnetic substance with all electrons paired.