If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship.
A
$${\text{t}} \propto \frac{1}{{{{\text{a}}^{\text{n}}}}}$$
B
$${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} - 1}}}}$$
C
$${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} + 1}}}}$$
D
$${\text{t}} \propto {{\text{a}}^{\text{n}}}$$
Correct Answer: $${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} - 1}}}}$$
