For a zero-order reaction, the units of the rate constant $k$ are:
AL mol⁻¹ s⁻¹
Bmol L⁻¹ s⁻¹
CL² mol⁻² s⁻¹
Ds⁻¹
Answer & Solution
Correct answer: B. mol L⁻¹ s⁻¹
Zero order: rate = $k$ (independent of [A]). So $k$ has the same units as rate: mol L⁻¹ s⁻¹.
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