Question

name the substance which remains in test tube after heating ferrous sulphte

Answer 1

Heating ferrous sulphate in a test tube, following reaction will takes place:

FeSO₄.7H₂O ------>FeSO₄ + 7H₂O

2FeSO₄---->Fe₂O₃ + SO₂ +SO₃

Both SO₂ that is sulfur dioxide and SO₃ that is sulfur trioxide, are gases that are colorless and evolved out.

Only Fe₂O₃, that is ferric oxide which is reddish brown in color remained in the teat tube.

So the answer is Fe₂O₃, that is ferric oxide which is reddish brown in color remain in a test tube after heating ferrous sulfate.

Answer 2

Ferric oxide (Fe2O3) which is reddish brown in color remains in the test tube after heating ferrous sulphate.
 

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