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What is photochemical reaction ? Give ex...

What is photochemical reaction ? Give examples.

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1) A decomposition reaction is occurs in the presence of sunlight is called photo- chemical reaction.
Example - 1 : `2AgBr overset("Sunlight")rarr 2Ag+Br_(2)`
Example - 2 : `6CO_(2)+6H_(2)O overset("sunlight")underset("chlorophyll")rarr underset("Glucose")(C_(6)H_(12)O_(6)+6O_(2))`
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