Which of the following are chemical changes?
Chemical Change
Physical Change
(a) Growth of a plant
(b) Rusting of iron
(c) Mixing of iron fillings and sand
(d) Cooking food
(e) Digestion of food
(f) Freezing of water
(g) Burning of candle
Therefore, (a) Growth of a plant, (b) Rusting of iron, (d) Cooking food, (e) Digestion of food, and (g) Burning of a candle are chemical changes.