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.
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Answer 1

ANS--- RUSTING OF IRON IS A CHEMICAL CHANGE

Answer 2

Among these Rusting of iron, cooking of food, Burning of a candle are chemical changes.