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← ScienceWhich outcome occurs when a molecular sieve adsorbs sufficiently heavy alkanes?
A)Increased framework bond vibrational energy
B)Reduced pore diameter until saturation✓
C)Enhanced zeolitic crystal framework doping
D)Reversible solid-state phase transformation
💡 Explanation
Adsorption of large alkanes causes blockage because steric hindrance reduces pore diameter, therefore limiting further uptake rather than vibration or doping. This blockage occurs therefore before phase transformations at saturation.
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