Question

2g of ferrous sulphate crystals were heated in a hard glass test tube and observations recorded. 

(i) What was the successive colour change? 

(ii) Identify the liquid droplets collected on the cooler parts of the test tube. 

(iii) What type of odour is observed on heating ferrous sulphate crystals? 

(iv) Name the products obtained on heating ferrous sulphate crystals. 

(v) What type of reaction is taking place?

Answer 1

(i) Green to white, then brown 

(ii) Water 

(iii) As of burning sulphur 

(iv) Ferric oxide, sulphur dioxide, sulphur trioxide

(v) Decomposition reaction