The role of chlorophyll is very important in photosynthesis. Chlorophyll that is present in the chloroplast of the plants is the green colour pigment that is necessary in order for plants to convert carbon dioxide to water using sunlight, into oxygen and glucose.

The experiment to show that chlorophyll is necessary for photosynthesis is as follows :-

A chlorophyll producing leaf along with the plant is taken and a chlorophyll bleached leaf along with the plant is taken.

Both these plants are destarched before the experiment and kept in the atmosphere containing water, carbon dioxide, and sunlight. After 24 hours the starch content of the leaf may be checked with an iodine solution to prove that the chlorophyll deprived plant did not produce any starch.

Introduction
Chlorophyll is an essential pigment in photosynthesis, the process by which plants and other organisms convert light energy into chemical energy. It is necessary for photosynthesis to occur because it is responsible for absorbing light energy from the sun, which is then used to convert carbon dioxide and water into glucose and oxygen. In this experiment, we will explore the importance of chlorophyll in photosynthesis.

Materials and Methods
Materials:
- Two small plants (one with chlorophyll and one without)
- Two cups of water
- Two clear plastic bags
- Two rubber bands
- Light source (lamp or sunlight)

Methods:
1. Fill both cups with water and place one plant in each cup.
2. Cover each plant with a clear plastic bag and secure it with a rubber band.
3. Place one plant in a well-lit area and the other plant in a dark area.
4. Leave the plants for a few days.
5. After a few days, observe the plants and record any differences in their growth.

Results
The plant that was placed in the well-lit area should have grown significantly more than the plant in the dark area. This is because chlorophyll is necessary for photosynthesis, which cannot occur without light. The plant in the well-lit area was able to perform photosynthesis, producing glucose and oxygen, while the plant in the dark area was not.

Discussion
This experiment demonstrates the importance of chlorophyll in photosynthesis. The plant with chlorophyll was able to absorb light energy and use it to convert carbon dioxide and water into glucose and oxygen. Without chlorophyll, photosynthesis cannot occur, and the plant is unable to produce glucose and oxygen. This experiment also highlights the importance of light in photosynthesis, as the plant in the well-lit area was able to grow significantly more than the plant in the dark area.

Conclusion
In conclusion, chlorophyll is necessary for photosynthesis because it is responsible for absorbing light energy from the sun, which is then used to convert carbon dioxide and water into glucose and oxygen. Without chlorophyll, photosynthesis cannot occur, and plants are unable to produce glucose and oxygen, which are necessary for their survival.