Bhawana took a pale green substance A in a test tube. And heated it over the flame of a burner. A brown colored residue B was formed along with evolution of two gases with burning smell of sulphur. Identify A & B. Write the chemical reaction involved.

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Bharati

"A" is Ferrous sulphate. When heated the following reaction takes place 2 FeSO4 --> Fe2O3 + SO2 + SO3 Residue B is Iron Oxide and the gases formed are SUlphur trioxide and sulphur dioxide
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A" is Ferrous sulphate. When heated the following reaction takes place 2 FeSO4 --> Fe2O3 + SO2 + SO3 Residue B is Iron Oxide and the gases formed are SUlphur trioxide and sulphur dioxide
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