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WalesCombined ScienceQuick questions
Unit 2 Chemistry 1: Rate of chemical change
Quick questions on Rates of reaction and collision theory - WJEC GCSE Science Double Award (Unit 2)
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is q1?Show answer
State the minimum energy needed for a collision to cause a reaction. [1 mark]
What is q2?Show answer
Why is the rate of a reaction usually fastest at the start? [1 mark]
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