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

1. Amount of oxygen evolved increases as the availability of carbon dioxide increases.
2. Amount of oxygen evolved decreases as the availability of carbon dioxide increases.
3. Amount of oxygen evolved increases as carbon dioxide in Water is absorbed by sodium bicarbonate.
4. Amount of oxygen evolved decreases as carbon dioxide in water is absorbed by sodium bicarbonate.