Question

Name the substance which remains in a test tube after heating ferrous sulphate

Answer 1

iron is the substances which remains in the test tube after heating as sulphur dioxide become gas

Answer 2

The substance that remains in test tube is Fe203 i. e ferric oxide or rust.
Ferrous sulphate on heating undergoes decomposition reaction. This is as follows:
2FeSO4=Fe2O3+SO2+SO3
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