Chemical Kinetics - Half-life, Activation Energy, Arrhenius Equation

Grade 12 Chemistry — Chemical Kinetics - Half-life, Activation Energy, Arrhenius Equation: 25 practice questions with instant scoring and explanations.

1. The Arrhenius equation is:
2. In Arrhenius equation, A is the:
3. Ea in Arrhenius equation is:
4. A plot of ln k vs 1/T gives:
5. From Arrhenius plot, the y-intercept gives:
6. The effect of temperature on rate constant is given by:
7. The activation energy is measured in:
8. A reaction with high Ea will have rate that:
9. A catalyst changes Ea by:
10. A catalyst does NOT change:
11. The half-life concept is most useful for:
12. For radioactive decay (first-order), after 3 half-lives, the fraction remaining is:
13. The relationship between t₁/₂ and Ea is:
14. The time constant (τ) for first-order reaction is related to k by:
15. For first-order reaction, after time t = 3τ, the fraction remaining is:
16. The temperature coefficient (Q₁₀) indicates how much rate increases for:
17. The Q₁₀ value for most reactions is between:
18. The collision theory explains rate by considering:
19. The steric factor (p) in collision theory accounts for:
20. The energy diagram shows that:
21. In an exothermic reaction, Ea is usually:
22. In an endothermic reaction, Ea is usually:
23. The relationship between Ea and ΔH is:
24. Using Arrhenius equation, if k increases from 0.01 to 0.1 s⁻¹ when T increases from 300 K to 310 K, Ea ≈:
25. The temperature dependence of reaction rate is captured by: