(c)The experiment to demonstrate that oxygen is released during photosynthesis is discussed below:

The diagram illustrating the experiment to show that oxygen is liberated during the process of photosynthesis as a bye-product.

Aim:The aim of the experiment is to show that oxygen is released by green plants during the process of photosynthesis.

Apparatus:The apparatus to be used are 2 beakers, two funnels, two test tubes, water plant (Elodea).

Method —the two beakers are filled with water and the water plant (elodea) is placed in beaker A and B. A glass funnel is turned upside down in the beaker in such a way that it covers the water plant. Turn a test tube with water upside down over the stalk of the funnel.

Experiment A is left exposed to sunlight while experiment B is covered with a cardboard paper or left to stay in the dark. The two experiments are left for some time to allow the observation to be made.

Observation:

Bubbles of gas are seen or observed in experiment A. When the expelled gas is tested with a glowing splint, it rekindles the glowing splint, confirming that the expelled gas is oxygen. There is no such observation of the discharge of bubbles of gas in experiment B.

Conclusion:

The observation in experiment air and the rekindling of the glowing splint by the gas expelled shows that oxygen is given out during the process of photosynthesis.

explain experimental

what is experiment a and b