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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.

NCERT Class 9th Science Ch 2 Is Matter Around Us Pure


A,b,d,e,g are chemical changes C and f are physical changes
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Answer- growth of a plant, rusting of iron, cooking of food, digestion of food and burning of candle
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