(a) What is the colour of ferrous sulphate crystals? How does this colour change after heating?
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The ferrous sulphate crystals are green in color and when you heat them up the color changes to brown.
FeSO4.xH2O ---(heating)--> Fe2O3 (brown in color) + SO2 + SO3 + xH2O (evaporated)
FeSO4.xH2O ---(heating)--> Fe2O3 (brown in color) + SO2 + SO3 + xH2O (evaporated)
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