Question

name the element which remains in a test tube after heating ferrous sulphate

Answer 1

ANSWER :- 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

The element which remains in test tube after heating ferrous sulphate is iron