List any two observation when ferrous sulphate is heated in a dry test tube
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Answer: When ferrous sulphate is heated colour changes from light green to reddish brown. On further heating, ferrous sulphate decomposes to form ferric oxide (Fe2O3), sulphur dioxide (SO2) and sulphur trioxide (SO3).
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Observation: Change in color of crystals from green to brown. This is because of the ferrous sulfate crystals on heating will loose water molecules and turn to white which immediately turns brown due to formation of ferric oxide
Change in colour of crystals from green to white.
2) Evolution of gas. The gases evolved are SO2 and SO3.
Explanation:
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