Question

In an experiment demonstrating the evolution of oxygen in Hydrilla, sodium bicarbonate is added to water in an experimental setup. What would happen if all other conditions are favourable?

• A. Amount of oxygen evolved decreases as carbon dioxide in water is absorbed by sodium bicarbonate
• B. Amount of oxygen evolved increases as the availability of carbon dioxide increases
• C. Amount of oxygen evolved decreases as the availability of carbon dioxide increases
• D. Amount of oxygen evolved increases as carbon dioxide in water is absorbed by sodium bicarbonate

Answer 1

The correct option is B

Amount of oxygen evolved increases as the availability of carbon dioxide increases

The addition of $NaHC{O}_3$ to water in the given experimental setup causes the availability of more carbon dioxide for photosynthesis. Thus, amount of oxygen evolved increases.