Which of the following is a chemical change?
a. Burning of candle c. Rusting of iron
b. Freezing of water d. Digestion of food
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Option (c) and (d)
Explanation:
Burning of candle and Freezing of water is physical change and can get reversible but Rusting of Iron and Digestion of food is chemical change because, it is irreversible and cannot get back the same property.
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