Answer: Collision frequency and steric factor.
- A Activation energy under typical conditions
- B Collision frequency and steric factor
- C Temperature coefficient according to standard textbooks
- D Rate at 0 K in general practice
Correct answer: B. Collision frequency and steric factor
Explanation: A = collision frequency × orientation probability (steric factor). It accounts for how often molecules collide with the right orientation.
First-order decay curve: concentration halves every t½, and that half-life is constant - a defining test for first-order kinetics.
Concept context
Study the speed of reactions and what affects it: concentration, temperature, and catalysts. Covers rate law, order of reaction, the Arrhenius equation, and reaction mechanisms step by step.