CAIE IGCSE Chemistry 6.1.1 Physical and Chemical Changes and Questions

Distinguish changes of state and dissolving from reactions that form new substances, using equations, particle diagrams and the identity of products.

Exam points

Distinguish physical changes from new substances using equations, particle diagrams and process tables.
Explain why a change of state is physical by stating that no new substance forms.

[Maximum number: 1]

When calcium carbonate is heated strongly, a gas is given off.
Which word describes this change?

chemical

exothermic

physical

reduction

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