Practice Average Rate - 4.1.1 | Chapter 4: Chemical Kinetics | ICSE Class 12 Chemistry
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4.1.1 - Average Rate

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Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the average rate if the concentration changes from 5M to 3M over 4 seconds?

πŸ’‘ Hint: Remember to subtract the final concentration from the initial.

Question 2

Easy

If the concentration of a reactant decreases from 10M to 8M in 2 seconds, what is the average rate?

πŸ’‘ Hint: Look for how much the concentration changes in that time.

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

The average rate of a reaction is determined by which of the following?

  • Change in time only
  • Change in concentration only
  • Change in concentration over time

πŸ’‘ Hint: Think about what the average rate measures.

Question 2

True or False: Instantaneous rate can only be calculated at the endpoints of a reaction.

  • True
  • False

πŸ’‘ Hint: Consider where slopes can be drawn on a graph.

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Challenge Problems

Push your limits with challenges.

Question 1

If a reactant decreases from 10M to 3M in 7 seconds, calculate the average rate. Then, calculate the instantaneous rate at 3 seconds if the graph shows a linear decrease.

πŸ’‘ Hint: Break it into parts: calculate average first, then use slope for instantaneous.

Question 2

Consider a reaction where the concentration starts at 5M and goes to 2M over a varying time interval (0-4s is 1M change, 4-8s is 0.5M change). Calculate average rate for each segment and compare them.

πŸ’‘ Hint: Focus on each interval separately to find the respective average rates.

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