[maneeeeee]

1. When exposed to light, the ferrioxalate ion dissociates into ferrous ions, oxalate ions, and carbon dioxide. Is this a spontaneous reaction?


2. During the trials involving the test tubes and flood lights, one test tube was not irradiated, some were irradiated with white light, and one was irradiated only with red light. I need help explaining these results in terms of absorption measurements.
results:
test tube 1: not irradiated - very faint green was observed
             2: exposure to white light for 5 sec- turned darker than test tube 1
             3  exposure to white light for 10 sec- turned darker than test tube 2
             4: exposure to white light for 20 sec- turned darker than test tube 3
             5. exposure to red light for 10 sec- very faint green like test tube 1
             6: test tube blaced in boiling water - very dark green colour 

Please help with reason why this happens?

Thank you!