For a purely second order elemental reaction having an initial reactant concentration , which of the — Chemical Kinetics Chemistry Question

💡 Solution & Explanation

A is true: $kt_{75\%} = \frac{1}{0.25a} - \frac{1}{a} = \frac{3}{a}$, and $kt_{50\%} = \frac{1}{0.5a} - \frac{1}{a} = \frac{1}{a}$. So, $t_{75\%} = 3 \times t_{50\%}$. B is true because reactant concentration drops over time, reducing the rate ($k[A]^2$). C is false because $t_{1/2} = \frac{1}{ka}$, so it relies heavily on concentration. D is true as it is the standard integrated equation for second-order kinetics.