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What does writing sunlight above the arrow in the following photosynthesis equation indicate?

\(6CO_2 + 6H_2O \xrightarrow{\text{sunlight}} C_6H_{12}O_6 + 6O_2\)

Answer and explanation

Correct answer: Sunlight supplies energy that is absorbed by the reactants, enabling the formation of glucose.

Photosynthesis requires an energy input to form energy-rich glucose from carbon dioxide and water. Plants absorb energy from sunlight to drive this reaction; therefore, sunlight is written above the arrow and the process is energy absorbing. Option C is incorrect because sunlight is not a catalyst: a catalyst generally remains unchanged after a reaction, whereas light is the source of energy for this process.

Related tags

ScienceClass10Chemical ReactionsPhotosynthesisEndothermic ReactionChemical Equations

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