(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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