Question

The kinetic study of a reaction like vA $\to$ P at 300 K provides the following curve, where concentration is taken in mol dm$^-3$ and time in min.
Identify the correct order(n) and rate constant(k) :

• A. n = 0, k = 4.0 mol dm $^{-3}min^{-1}$
• B. n = 1/2, k = 2.0 $mol^{1/2}$ $dm^{3/2} min^{-1}$
• C. n = 1, k = 8.0 $ min^{-1}$
• D. n = 2, k = 16.0 $ dm^{3}mol^{-1}min^{-1}$

Answer 1

Answer: (D)

$\sqrt{r_{0}}=4\left[A_{0}\right], r_{0}=16\left[A_{0}\right]^{2}, Rate =k\left[A_{0}\right]^{n} \therefore k=16 and n=2$