Give an example of a decomposition reaction. Describe an activity to illustrate such a reaction by heating?

Give an example of a decomposition reaction. Describe an activity to illustrate such a reaction by heating?

Example of decomposition reaction:
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2g of lead nitrate is taken in a boiling tube and heated, on heating, lead nitrate decomposes to produce lead oxide, nitrogen dioxide and oxygen. The chemical equation involved in the reaction is:
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