Question detail
What is the purpose of controlling variables in experiments comparing reaction rates?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Rate of reaction
Question
- A. To ensure that only one factor is tested at a time
- B. To increase the speed of the reaction
- C. To make the experiment more complex
- D. To reduce the amount of reactants used
Answer
To ensure that only one factor is tested at a time
Explanation
The correct answer is To ensure that only one factor is tested at a time. This answer directly addresses the question: What is the purpose of controlling variables in experiments comparing reaction rates? It matches the approved Chemistry 8462 learning objective and the linked subtopic. The other options are incorrect because they either change the rate, catalyst, reversible reaction, equilibrium, or graph context, or they do not answer the exact point being tested.
Common mistake
Ignoring Control Variables
Students often forget to control variables when comparing reaction rates, leading to unreliable results.
Always identify and maintain constant conditions such as temperature, concentration, and surface area to ensure a fair comparison.
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