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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.

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Following are Chemical changes. 

(a)Growth of a plant 

(b)Rusting of iron 

(c) Cooking of food 

(d)Digestion of food 

(e) Burning of a candle.

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