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← ScienceWhich risk increases when iron catalyst surface area declines?
A)Shift in Haber-Bosch equilibrium
B)Decreased nitrogen partial pressure
C)Methane production is accelerated
D)Ammonia synthesis rate declines✓
💡 Explanation
Ammonia synthesis declines because the rate-determining step relies on reactant adsorption via chemisorption; therefore, surface reduction limits active sites, rather than favoring methanation or partial pressure changes, impacting equilibrium indirectly.
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