Question

The half-life of a reaction is inversely proportional to the square of the initial concentration of the reactant. Then the order of the reaction is:

• A. 0
• B. 1
• C. 2
• D. 3

Hint:

For second-order reactions, the half-life is inversely proportional to the initial concentration.

Answer 1

The Correct Option is C

For a reaction with half-life inversely proportional to the square of the initial concentration, the reaction follows second-order kinetics. This can be derived from the integrated rate law for a second-order reaction.

Step 2: Conclusion.
Thus, the correct answer is (3) second order.