NCERT Ex Q11 - Is Matter Around Us Pure?
Question: 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: Chemical changes: a, b, d, e, g.
Full step-by-step NCERT solution with diagrams on Something by Zero.