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A Test tube containing water, Ferricyani...

A Test tube containing water, Ferricyanide and isolated chloroplasts was illuminated. A gas start evolving on the basis of their experiment. Answer the following questions.
Explain the process (step) by which it is evolved?

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Process is light reaction of photosynthesis. Photolysis of water occurs during non cyclic photophosphorylation of light reaction. Water is split and oxygen is released.
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