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Why is photosynthesis considered a chemical reaction?

Answer and explanation

Correct answer: Because new substances, such as glucose and oxygen, are formed from carbon dioxide and water.

During photosynthesis, carbon dioxide and water are converted into glucose and oxygen in the presence of light and chlorophyll. The formation of new substances is the key feature of a chemical reaction. In contrast, the change of water into water vapour is only a change of state, and no new substance is formed.

Related tags

ScienceClass 10PhotosynthesisChemical ReactionsChemical Equations

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