Which of the following are chemical changes?

Question 11. Which of the following are chemical changes?
(a) Growth of a plant
(b) Rusting of iron
(c) Mixing of iron filings and sand
(d) Cooking of food
(e) Digestion of food
(f) Freezing of water
(g) Burning of a candle.
Answer: Examples of chemical changes are
Growth of plant, Rusting of Iron, Cooking of food, Digestion of food, and burning of candle.