Question

Given the equation:
6CO2 + 6H2O → C6H12O6 + 6O2 {Under sunlight & Chlorophyll)
The oxygen given off during the above process is derived from

Answer 1

the oxygen is derived from carbon dioxide

Answer 2

the oxygen comes from water.

this can be proved by using H2S instead of H2O which gives sulphur as the product.

hence it can be seen that even when CO2 was present , the product was changed when we use H2S instead of H2O.
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