(i) In the combination reaction of adding water to quick lime, name the product formed and write its colour.
(ii) While studying the decompostion reaction, by heating anhydrous ferrous sulphate crystals in a test-tube, a product is formed in the test-tube. Name the product and write its colour.
(i) Quicklime (CaO) reacts vigorously with water to form slaked lime [Ca(OH)2], which is white in colour.
CaO(s)+H2O(l)→Ca(OH)2(s)Calcium oxideCalcium hydroxide(Quich lime)(Slaked lime)(white)
(ii) When anhydrous ferrous sulphate is heated strongly, it decomposes to form brown coloured ferric oxide along with sulphur dioxide and sulphur trioxide gases.
2FeSO4(s)Δ−→Fe2O3(s)+SO2(g)+SO3(g)Ferrous sulphateFerric oxide(white colour)(brown)