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Question

You want to study a decomposition reaction by taking ferrous sulphate crystals in a boiling tube.List two precautions you would follow while doing the experiment.


Solution

1) Do not point the mouth of the boiling tube at your neighbours or yourself. 
2) Waft gases emitted from ferrous sulphate on heating gently towards your nose holding the test tube at a distance. The gases SO2 and SO3 are very harmful, so do not take a deep breath when smelling the odour of the gases.
3) Always use a test tube holder while heating the test tube.

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