alleryFor a first-order reaction, the units of the rate constant $k$ are:
AL² mol⁻² s⁻¹
Bs⁻¹
Cmol L⁻¹ s⁻¹
DL mol⁻¹ s⁻¹
Answer & Solution
Correct answer: B. s⁻¹
**First order:** rate = $k[A]$.
Solving for $k$ units: (mol L⁻¹ s⁻¹)/(mol L⁻¹) = s⁻¹.
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