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Why are combustion and respiration placed in the same category on the basis of energy change?

Answer and explanation

Correct answer: Both release energy

In combustion, oxidation of a fuel releases energy, mainly as heat and often as light. In respiration, glucose undergoes controlled oxidation and releases energy for life processes. Therefore, both are exothermic processes. In contrast, a requirement for light is associated with processes such as photosynthesis, not with both combustion and respiration.

Related tags

ScienceClass10Chemical ReactionsCombustionRespirationExothermic Reactions

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