Molecular Orbitals | MCQs
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A. Molecular Orbital Theory (MOT)
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B. Resonance
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C. None of these
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D. Hybridization
Explanation
O₂ (oxygen molecule) is paramagnetic because it has unpaired electrons in its molecular orbitals.
According to Molecular Orbital Theory (MOT), the electronic configuration of O₂ reveals
There are two unpaired electrons in the π* anti-bonding orbitals, which are responsible for its paramagnetic properties.
Hybridization and resonance do not directly explain the presence of unpaired electrons in this context.
ایک مداری جو جوہری مدار کے مقابلے میں کم توانائی رکھتا ہے جس سے یہ تشکیل پایا جاتا ہے اسے ______ کہا جاتا ہے؟
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A. None of these
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B. Bounding
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C. Antibounding
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D. Addition
Explanation
- A bonding orbital is formed by the constructive interference of atomic orbitals.
- It resulting in lower energy compared to the atomic orbitals.
- It promotes the stability of the molecule by holding the nuclei together.
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A. VSEPR theory
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B. M.O theory
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C. Hybridization
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D. None of these
Explanation
- BF₃ has a trigonal planar geometry with 120° bond angles, which cannot be explained by pure p orbitals (90°).
- The concept of sp² hybridization explains the observed bond angles by mixing one s and two p orbitals.
ہائبرڈ مدار کے کس سیٹ میں پلانر سہ رخی شکل ہے؟
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A. sp
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B. sp³
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C. sp²
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D. None of these
Explanation
sp² hybridization involves one s and two p orbitals, forming three hybrid orbitals in a planar triangular (trigonal planar) shape.
The bond angles in this geometry are approximately 120°, seen in molecules like BF₃ or C₂H₄.
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