Hello Mam,

Please clear my doubt,

We place a water plant - a hydrilla in a beaker of water and place a funnel over it which is closed by an test tube.This is now placed below a source of light. Now from the beaker the plant releases oxygen gas.

With the same apparatus when we add afew drops of baking soda to the water,there is a sudden increase in number of gas bubbles coming out.

Why is it so?

Thank You


Asked by seeni2005 | 28th May, 2019, 02:05: PM

Expert Answer:

Oxygen is evolved as a result of photosynthesis when Hydrilla plant is subjected to a source of light.

When baking soda is added to water, the alkali and the acid react with one another and produce carbon dioxide gas which appear as bubbles.

Answered by Sheetal Kolte | 28th May, 2019, 02:29: PM