19. When ferrous sulphate
crystals are heated, a change in
colour from green to white and
ther to brown is observed
Change in colour from green to
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On heating, ferrous sulphate crystals lose water. So their colour changes from light green to white due to the formation of anhydrous ferrous sulphate (FeSO4). When ferrous sulphate is heated, it gives ferric oxide, sulphur dioxide and sulphur trioxide.
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