A) \[k=r\times {{c}^{2}}\]
B) \[k=r\times c\]
C) \[k=\frac{c}{r}\]
D) \[k=\frac{r}{c}\]
Correct Answer: D
Solution :
Let us consider a hypothetical change. \[A\xrightarrow{{}}B\] Suppose it is a first order reaction, then its rate will be given as: \[\frac{dx}{dt}=k{{[A]}^{1}}\] \[\because \] \[\frac{dx}{dt}=r\] [A] = Concentration then \[r=kc\] or \[k=\frac{r}{c}\]
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