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(a) Growth of a plant
(b) Rusting of iron
(c) Mixing of iron filings and sand
(d) Cooking of food
(e) Digestion of food
(j) Freezing of water
(g) Burning of a candle
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Growth of a plant, Rusting of iron, Cooking of food, Digestion of food and Burning of a candle are chemical changes.
Chemical change brings change in the chemical properties of matter and a new substances is formed. A chemical change is also called a chemical reaction. All of the above changes have resulted in the formation of new substances as a result of chemical reactions.
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