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•Take about 2 g ferrous sulphate crystal...

•Take about 2 g ferrous sulphate crystals in a dry bottle tube.
• Note the colour of the ferrous sulphate crystals.
• Heat the boiling tube over the flame of a burner or spirit lamp as shown in Fig.

Observe the colour of the crystals after heating.

Text Solution

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Observation: The colour of ferrous sulphate crystals is green before heating. It becomes colourless after heating.
`2FeSO_4 overset("Heat")(rarr)Fe_2O_3 + SO_2 + SO_3`
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