Half life cycle of an order of reaction is inversely proportional to initial concentration raised to the power one less than order of reaction. For which of the following half-life of an order of reaction is inversely proportional to the initial concentration of reactants?
Correct answer: C. 2nd order
- A. Zero order
- B. 1st order
- C. 2nd order
- D. 3rd order
Explanation
In a second-order reaction, the rate of reaction is proportional to the square of the concentration of the reactant. The half-life of a second-order reaction is given by t1/2 = 1 / (k[A]₀) where [A₀] is the initial concentration of the reactant and "k" is the rate constant. As the half-life is inversely proportional to initial concentration. This satisfies the statement's condition.
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Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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