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Which outcome occurs when excessive vibrational energy is transferred to a diatomic molecule?

A)Absorption of ultraviolet radiation
B)Dissociation into constituent atoms
C)Excitation to higher electronic state
D)Increase in rotational energy level

💡 Explanation

When a diatomic molecule gains excessive vibrational energy, bond rupture occurs because kinetic energy exceeds bond strength, leading to dissociation into individual unbound atoms. Therefore molecular dissociation results, rather than excitation, radiation absorption, or increased rotation energy, which require lower energy transitions or different mechanisms.

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