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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What defines a first-order reaction?
💡 Hint: Focus on how many reactants affect the rate.
Question 2
Easy
What is the half-life formula for first-order reactions?
💡 Hint: Recall how to derive the half-life expression.
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 rate equation for a first-order reaction?
- Rate = k[A]
- Rate = k[A]^2
- Rate = k[A][B]
💡 Hint: Consider the power of the concentration in the rate law.
Question 2
The half-life for a first-order reaction depends on the initial concentration.
- True
- False
💡 Hint: Recall the properties of half-lives for different reaction orders.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A reaction has a rate constant of 0.03 s⁻¹. If 1 mole of the substance is present at t=0, how long will it take for 90% of it to decay? What will be the concentration at that time?
💡 Hint: Use the integrated first-order rate law.
Question 2
A pharmacologist discovers a drug with a half-life of 3 hours. If a patient receives an initial dose of 120 mg, how much will remain after 9 hours?
💡 Hint: Apply the concept of halving the amount every half-life.
Challenge and get performance evaluation