Which answer includes all the following that are chemical changes and not physical changes?
I. freezing of water
II. rusting of iron
III. dropping a piece of iron into hydrochloric acid (H₂ is produced)
IV. burning a piece of wood
V. emission of light by a kerosene oil lamp
II, III, IV, and V
III and IV
II and V
II, III, and V
📝 Batafsil tushuntirish
Rusting, reaction with hydrochloric acid, burning wood, and combustion in a kerosene lamp are chemical changes. Freezing is a physical change.
