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Which consequence results when reactant concentration limits endothermic reaction rates?

A)Equilibrium shifts towards larger molecules
B)Activation energy then effectively increases
C)Reverse reaction becomes thermodynamically favored
D)Kinetic bottleneck develops at rate limit

💡 Explanation

A kinetic bottleneck arises because the rate-determining step's reaction rate depends on low reactant concentration; this limits the progress. Therefore product formation slows significantly rather than the reverse reaction being instantaneously favored because activation relies on molecular collisions limiting concentration influences probability.

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