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Which mechanism limits vibrational excitation efficacy in complex molecules?

A)Collisional deactivation transfers kinetic energy
B)Resonance stabilization lowers molecular energy
C)Hyperconjugation redistributes electron density
D)Steric hindrance blocks vibration modes

💡 Explanation

Collisional deactivation quenches vibrations to thermal energy because frequent molecular collisions transfer excess energy away into the surroundings, therefore limiting resonant absorption, rather than altering electronic structure or hindering atomic motions in less crowded positions.

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