For zero-order reaction A → P, rate equals:
Ak [A]
Bk (constant, independent of [A])
Ck [A]²
Dk × t
Answer & Solution
Correct answer: B. k (constant, independent of [A])
Rate = k for zero-order. [A] decreases linearly with time: [A] = [A]₀ - kt. Half-life = [A]₀/(2k) — depends on initial concentration. Examples: surface-catalyzed reactions when catalyst is saturated.
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