What is a catalyst?
✓ Correct Answer: Option B
A catalyst lowers activation energy, speeding up reactions without being permanently changed.
📚 About This Everyday Science Practice Question
This 2-level Everyday Science question from the Physics - Heat, Light, Sound topic is part of One Paper Preparation's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free Everyday Science practice test or use flashcards for spaced repetition review.