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1.1 The particle model

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Question 15

Charcoal is mostly carbon. When charcoal burns in oxygen, the black solid is used up and carbon dioxide gas forms.

Which statement uses the particle model to explain why this is a chemical change?

[1]
A

The carbon particles stay the same but move far apart, as they do when any solid turns into a gas.

B

The carbon particles gain enough kinetic energy to overcome their attractions, which turns them into a new substance.

C

The oxygen molecules spread out among the carbon particles, so the carbon becomes mixed into the gas.

D

Carbon atoms and oxygen atoms are rearranged to make carbon dioxide molecules, which are different particles.

Markscheme

1.1 The particle model Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 The particle model

93 exam-style questions on OCR GCSE Chemistry 1.1 The particle model, covering 1.1.1 The particle model and changes of state and 1.1.2 Limitations of the particle model. Each one has a worked solution and a mark scheme showing where the marks go.

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