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Why is digestion of food considered a chemical reaction?

Answer and explanation

Correct answer: Complex substances in food chemically change into simpler new substances

During digestion, enzymes chemically convert complex food molecules into simpler substances. For example, starch is converted into simpler substances such as glucose. The formation of new substances identifies digestion as a chemical reaction. In contrast, merely cutting or chewing food into smaller pieces is mainly a physical change because no new substances are formed.

Related tags

ScienceClass10Chemical ReactionsDigestionChemical Change

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