Question

Experiment to show that carbon dioxide is necessary for photosynthesis

Answer 1

1. take a destarched potted plant
2. now take a wide mouthed jar with KMnO4 crystalls in it
3. put one of the leaves in it and cork it
4. now put the plant In sunlight for one day
5. next day take out the leaf and compare with an exposed leaf by testing the presence of starch
6. we can observe the leaf which was in the bottle doesn't change its colour indicating absence of Starch