Question

On heating ferrous sulphate following observations are seen i. Brown coloured nitrogen dioxide gas. ii. Pungent smelling oxides of sulphur. iii. Oxygen gas. iv. Acidic gases are produced. Which of the following two combinations are correct? • A. i and iii B. i and iv C. ii and iii D. ii and iv​

Answer 1

Answer:

Ferrous sulphate crystals contain water molecules (FeSO4. 7H2O). On heating, ferrous sulphate crystals lose water and anhydrous ferrous sulphate (FeSO4) is formed. So their colour changes from light green to white.