Question

Name the solution in which the leave must be boil to remove the chlorophyll

Answer 1

Hint: Chlorophyll is the molecule that absorbs sunlight and converts its energy into carbohydrates by combining $CO_2$ and water. This mechanism is known as photosynthesis, and it is the foundation for all plants' life cycles.

Complete answer:
Chlorophyll is a green photosynthetic pigment that is found in plants, algae and cyanobacteria. It absorbs Light between the blue to lesser red portion of the electromagnetic spectrum.
Chlorophyll is removed from the leaves for testing starch chlorophyll is a green pigment it usually marks the colour of the iodine test for starch therefore leaves need to be decolorized.

Iodine test is used to test the presence of starch
1. It is done by heating a plant leaf in boiling water for 30 seconds this usually kills the leaves and stop the chemical process
2. Then it is added to boiling ethanol in water for a few minutes. The boiling ethanol dissolves the chlorophyll and removes the green colour from the leaf so the leaf turns white.
3. Now wash with water to rehydrate the leaves and soften the leaf.
4. Spread it on a glass and add an iodine solution from a pipette.
To decolorize, leaves must be boiled in ethanol to remove the chlorophyll.

Note: Chlorophyll molecules are specifically arranged around a pigment protein Complex called photosystem which are embedded in the thylakoid membrane of chloroplast.