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What happens when ferrous sulphate crystals are heated?

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Solution :When ferrous sulphate crystals are heated, the colour changes from green to white because of dehydration and then a brown solid of ferric oxide is formed with the smell of burning SULPHUR.
`UNDERSET(("Green"))(FeSO_(4)).7H_(2)Ooverset("Heat")(to)underset(("White"))(FeSO_(4))+7H_(2)O`
`2FeSO_(4)OVERSET("Heat")(to)Fe_(2)O_(3)+underset(("Brown"))(SO_(2))+SO_(3)`


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