Question

what is the colour of Residue when crystals of light green iron sulphate are heated in a hard glass test tube ​

Answer 1

Answer:

dark brown colour formed

Answer 2

Answer:

when iron sulphate is heated it undergoes thermal decomposition reaction where in the water substance evaporate leaving a brown flaky coloured iron oxide and liberates sulphur dioxide and sulphur trioxide

Explanation:

2FeSO4.7H2O + heat = 2Fe2O3+ SO2+ SO3+ 14H2O

14 molecules of water evaporates