Question

name the substance which remains in a test tube after hearing ferrous sulphate​

Answer 1

Answer:

Ferric oxide which is reddish brown in colour

Answer 2

Fe2O3

FERRIC OXIDE

Heating farrow sulfate in a test tube following reaction takes place

FeSO4.7H2O→FeSO4+7H2O2FeSO4→Fe2O3+SSO+SO3

Both SO2 and SO3 are gases that colorless and evolved out

Only Fe2O3 that is ferric oxide which reddish brown in colour remained in the fort tube ,so the answer is Fe2O3 that is ferric oxide