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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define half-life in your own words.
💡 Hint: Think about it as time related to decay.
Question 2
Easy
What is the half-life formula for a first-order reaction?
💡 Hint: Recall the specific variable associated with first-order kinetics.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the half-life of a first-order reaction?
- Depends on initial concentration
- Constant regardless of concentration
- Decreases with time
💡 Hint: Think about how a reaction behaves as it progresses.
Question 2
True or False: For zero-order reactions, half-life decreases as reactant concentration decreases.
- True
- False
💡 Hint: Consider the implications of the zero-order definition.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A first-order reaction has a rate constant of 0.5 h-1. How much of the reactant is left after 4 hours if you start with 1 mole?
💡 Hint: Use the half-life formula and calculate the fraction remaining after each half-life period.
Question 2
For a zero-order reaction where k = 0.1 M/s and the initial concentration is 1 M, calculate the concentration after 20 seconds.
💡 Hint: Consider how zero-order dependencies work over time.
Challenge and get performance evaluation