The image contains multiple questions, what question do you want me to answer?
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The user has provided an image featuring a set of chemistry questions. The questions pertain to chemical reactions, including definitions, examples of chemical changes, writing chemical reactions based on observed changes, and providing reasons for certain phenomena. This appears to be homework or study questions from a chemistry textbook.
Answer
A photochemical reaction is initiated by light absorption (e.g., photosynthesis), while an electrochemical reaction involves electron transfer (e.g., electrolysis of water).
- (a) A photochemical reaction is a chemical reaction initiated by the absorption of light. Example: Photosynthesis. (b) An electrochemical reaction is a chemical reaction that involves electron transfer. Example: Electrolysis of water.
Answer for screen readers
- (a) A photochemical reaction is a chemical reaction initiated by the absorption of light. Example: Photosynthesis. (b) An electrochemical reaction is a chemical reaction that involves electron transfer. Example: Electrolysis of water.
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