Question

1) Action of water on quicklime
2) action of heat on ferrous dulphate crysats

Answer 1

Explanation:

When this anhydrous ferrous sulphate is heated, it decomposes to give ferric oxide, sulphur dioxide and sulphur trioxide. In this reaction, one substance FeSO4(s) is splitting up into three substances Fe2O3(s), SO2(g), SO3(g) because it takes place due to heat.