alleryThe units of the rate constant for a zero-order reaction are:
A$\text{mol}\,L^{-1}\,s^{-1}$
B$L^2\,\text{mol}^{-2}\,s^{-1}$
C$L\,\text{mol}^{-1}\,s^{-1}$
D$s^{-1}$
Answer & Solution
Correct answer: A. $\text{mol}\,L^{-1}\,s^{-1}$
Units of $k$ for an $n$-th order reaction are $\text{mol}^{1-n}\,L^{n-1}\,s^{-1}$.
Putting $n=0$ gives $\text{mol}\,L^{-1}\,s^{-1}$, which is the same as the unit of rate itself, since the rate of a zero-order reaction is independent of concentration.
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