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Which outcome slows polymer chain propagation under monomer depletion?

A)Reduced collision frequency of propagation reaction
B)Increased termination due to biradicals
C)Enhanced energy transfer from monomers
D)Lowered reaction order for initiation

💡 Explanation

The reaction rate decreases because the mass action law results in rate being proportional to monomer concentration through the Arrhenius equation; therefore lower concentration reduces the probability *bimolecular collision*, rather than changing reaction order at initiation.

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